21274107633 has 12 divisors (see below), whose sum is σ = 30730530688. Its totient is φ = 14182155000.

The previous prime is 21274107619. The next prime is 21274107637. The reversal of 21274107633 is 33670147212.

21274107633 is a `hidden beast` number, since 2 + 1 + 2 + 7 + 4 + 10 + 7 + 633 = 666.

It is not a de Polignac number, because 21274107633 - 2¹² = 21274103537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21274107637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412008 + ... + 460758.

Almost surely, 2^21274107633 is an apocalyptic number.

It is an amenable number.

21274107633 is a deficient number, since it is larger than the sum of its proper divisors (9456423055).

21274107633 is a wasteful number, since it uses less digits than its factorization.

21274107633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97244 (or 97241 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The spelling of 21274107633 in words is "twenty-one billion, two hundred seventy-four million, one hundred seven thousand, six hundred thirty-three".