21534055532 has 24 divisors (see below), whose sum is σ = 42897883392. Its totient is φ = 9362632400.

The previous prime is 21534055523. The next prime is 21534055541. The reversal of 21534055532 is 23555043512.

It is an interprime number because it is at equal distance from previous prime (21534055523) and next prime (21534055541).

It is a junction number, because it is equal to n+sod(n) for n = 21534055492 and 21534055501.

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, 10638344 + ... + 10640367.

It is an arithmetic number, because the mean of its divisors is an integer number (1787411808).

Almost surely, 2^21534055532 is an apocalyptic number.

21534055532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21534055532 is a deficient number, since it is larger than the sum of its proper divisors (21363827860).

21534055532 is a wasteful number, since it uses less digits than its factorization.

21534055532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21278749 (or 21278747 counting only the distinct ones).

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

The spelling of 21534055532 in words is "twenty-one billion, five hundred thirty-four million, fifty-five thousand, five hundred thirty-two".