21135753832 has 32 divisors (see below), whose sum is σ = 39757910400. Its totient is φ = 10533692800.

The previous prime is 21135753803. The next prime is 21135753833. The reversal of 21135753832 is 23835753112.

It is not an unprimeable number, because it can be changed into a prime (21135753833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5104419 + ... + 5108557.

It is an arithmetic number, because the mean of its divisors is an integer number (1242434700).

Almost surely, 2^21135753832 is an apocalyptic number.

It is an amenable number.

21135753832 is a deficient number, since it is larger than the sum of its proper divisors (18622156568).

21135753832 is a wasteful number, since it uses less digits than its factorization.

21135753832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6057 (or 6053 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The spelling of 21135753832 in words is "twenty-one billion, one hundred thirty-five million, seven hundred fifty-three thousand, eight hundred thirty-two".