21545535032 has 32 divisors (see below), whose sum is σ = 48598953600. Its totient is φ = 8747810784.

The previous prime is 21545535001. The next prime is 21545535047. The reversal of 21545535032 is 23053554512.

It is a junction number, because it is equal to n+sod(n) for n = 21545534983 and 21545535001.

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, 10123718 + ... + 10125845.

It is an arithmetic number, because the mean of its divisors is an integer number (1518717300).

Almost surely, 2^21545535032 is an apocalyptic number.

It is an amenable number.

21545535032 is an abundant number, since it is smaller than the sum of its proper divisors (27053418568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21545535032 is a wasteful number, since it uses less digits than its factorization.

21545535032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20249595 (or 20249591 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 21545535032 in words is "twenty-one billion, five hundred forty-five million, five hundred thirty-five thousand, thirty-two".