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21000330133 = 94722175639
BaseRepresentation
bin10011100011101101…
…111001101110010101
32000012112211022012221
4103203231321232111
5321002041031013
613351501542341
71342256601166
oct234355715625
960175738187
1021000330133
1189a7158942
1240a0b749b1
131c989cc163
1410330bb76d
1582d9b508d
hex4e3b79b95

21000330133 has 4 divisors (see below), whose sum is σ = 21022506720. Its totient is φ = 20978153548.

The previous prime is 21000330083. The next prime is 21000330149. The reversal of 21000330133 is 33103300012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21000330133 - 29 = 21000329621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000330233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11086873 + ... + 11088766.

It is an arithmetic number, because the mean of its divisors is an integer number (5255626680).

Almost surely, 221000330133 is an apocalyptic number.

It is an amenable number.

21000330133 is a deficient number, since it is larger than the sum of its proper divisors (22176587).

21000330133 is an equidigital number, since it uses as much as digits as its factorization.

21000330133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22176586.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 21000330133 its reverse (33103300012), we get a palindrome (54103630145).

The spelling of 21000330133 in words is "twenty-one billion, three hundred thirty thousand, one hundred thirty-three".

Divisors: 1 947 22175639 21000330133