21554503532 has 12 divisors (see below), whose sum is σ = 38597599656. Its totient is φ = 10526617920.

The previous prime is 21554503511. The next prime is 21554503561. The reversal of 21554503532 is 23530545512.

It is a super-2 number, since 2×21554503532² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21554503492 and 21554503501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62658269 + ... + 62658612.

It is an arithmetic number, because the mean of its divisors is an integer number (3216466638).

Almost surely, 2^21554503532 is an apocalyptic number.

It is an amenable number.

21554503532 is a deficient number, since it is larger than the sum of its proper divisors (17043096124).

21554503532 is a wasteful number, since it uses less digits than its factorization.

21554503532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125316928 (or 125316926 counting only the distinct ones).

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

The spelling of 21554503532 in words is "twenty-one billion, five hundred fifty-four million, five hundred three thousand, five hundred thirty-two".