21757553432 has 32 divisors (see below), whose sum is σ = 42598828800. Its totient is φ = 10398525984.

The previous prime is 21757553423. The next prime is 21757553471. The reversal of 21757553432 is 23435575712.

It is a super-2 number, since 2×21757553432² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227933 + ... + 308979.

It is an arithmetic number, because the mean of its divisors is an integer number (1331213400).

Almost surely, 2^21757553432 is an apocalyptic number.

It is an amenable number.

21757553432 is a deficient number, since it is larger than the sum of its proper divisors (20841275368).

21757553432 is a wasteful number, since it uses less digits than its factorization.

21757553432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82535 (or 82531 counting only the distinct ones).

The product of its digits is 882000, while the sum is 44.

The spelling of 21757553432 in words is "twenty-one billion, seven hundred fifty-seven million, five hundred fifty-three thousand, four hundred thirty-two".