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20133521431 = 232143408479
BaseRepresentation
bin10010110000000011…
…010010100000010111
31220222010202212012221
4102300003102200113
5312213140141211
613125455123211
71311633052132
oct226003224027
956863685187
1020133521431
1185a1936711
123a9a813507
131b8b2571ba
14d8dd21219
157cc842c71
hex4b00d2817

20133521431 has 8 divisors (see below), whose sum is σ = 21018746880. Its totient is φ = 19249117272.

The previous prime is 20133521341. The next prime is 20133521449. The reversal of 20133521431 is 13412533102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20133521431 - 217 = 20133390359 is a prime.

It is a super-2 number, since 2×201335214312 (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20133521396 and 20133521405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133521231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154951 + ... + 253528.

It is an arithmetic number, because the mean of its divisors is an integer number (2627343360).

Almost surely, 220133521431 is an apocalyptic number.

20133521431 is a deficient number, since it is larger than the sum of its proper divisors (885225449).

20133521431 is a wasteful number, since it uses less digits than its factorization.

20133521431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410645.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 20133521431 in words is "twenty billion, one hundred thirty-three million, five hundred twenty-one thousand, four hundred thirty-one".

Divisors: 1 23 2143 49289 408479 9395017 875370497 20133521431