21732911852 has 24 divisors (see below), whose sum is σ = 39161020080. Its totient is φ = 10545560640.

The previous prime is 21732911839. The next prime is 21732911891. The reversal of 21732911852 is 25811923712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131174 + ... + 246317.

It is an arithmetic number, because the mean of its divisors is an integer number (1631709170).

Almost surely, 2^21732911852 is an apocalyptic number.

It is an amenable number.

21732911852 is a deficient number, since it is larger than the sum of its proper divisors (17428108228).

21732911852 is a wasteful number, since it uses less digits than its factorization.

21732911852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377921 (or 377919 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The spelling of 21732911852 in words is "twenty-one billion, seven hundred thirty-two million, nine hundred eleven thousand, eight hundred fifty-two".