21164634153 has 32 divisors (see below), whose sum is σ = 33927089280. Its totient is φ = 12962617920.

The previous prime is 21164634083. The next prime is 21164634157. The reversal of 21164634153 is 35143646112.

21164634153 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 4 + 634 + 15 + 3 = 666.

It is not a de Polignac number, because 21164634153 - 2¹⁷ = 21164503081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21164634157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68826 + ... + 216947.

It is an arithmetic number, because the mean of its divisors is an integer number (1060221540).

Almost surely, 2^21164634153 is an apocalyptic number.

It is an amenable number.

21164634153 is a deficient number, since it is larger than the sum of its proper divisors (12762455127).

21164634153 is a wasteful number, since it uses less digits than its factorization.

21164634153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286006 (or 286000 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 21164634153 in words is "twenty-one billion, one hundred sixty-four million, six hundred thirty-four thousand, one hundred fifty-three".