21036165152 has 24 divisors (see below), whose sum is σ = 41689230912. Its totient is φ = 10448424000.

The previous prime is 21036165151. The next prime is 21036165179. The reversal of 21036165152 is 25156163012.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (21036165151) 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, 2171924 + ... + 2181587.

It is an arithmetic number, because the mean of its divisors is an integer number (1737051288).

Almost surely, 2^21036165152 is an apocalyptic number.

It is an amenable number.

21036165152 is a deficient number, since it is larger than the sum of its proper divisors (20653065760).

21036165152 is a wasteful number, since it uses less digits than its factorization.

21036165152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4353672 (or 4353664 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 21036165152 in words is "twenty-one billion, thirty-six million, one hundred sixty-five thousand, one hundred fifty-two".