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20541031 = 73779309
BaseRepresentation
bin100111001011…
…0111001100111
31102122120222221
41032112321213
520224303111
62012133211
7336411250
oct116267147
942576887
1020541031
111065a865
126a67207
134342774
142a29b27
151c0b371
hex1396e67

20541031 has 8 divisors (see below), whose sum is σ = 24110240. Its totient is φ = 17130528.

The previous prime is 20541023. The next prime is 20541043. The reversal of 20541031 is 13014502.

Adding to 20541031 its reverse (13014502), we get a palindrome (33555533).

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 20541031 - 23 = 20541023 is a prime.

It is a super-2 number, since 2×205410312 = 843867909085922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20540996 and 20541014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39396 + ... + 39913.

It is an arithmetic number, because the mean of its divisors is an integer number (3013780).

Almost surely, 220541031 is an apocalyptic number.

20541031 is a deficient number, since it is larger than the sum of its proper divisors (3569209).

20541031 is an equidigital number, since it uses as much as digits as its factorization.

20541031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79353.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20541031 is about 4532.2214200103. The cubic root of 20541031 is about 273.8676567976.

The spelling of 20541031 in words is "twenty million, five hundred forty-one thousand, thirty-one".

Divisors: 1 7 37 259 79309 555163 2934433 20541031