21325555332 has 36 divisors (see below), whose sum is σ = 53911742976. Its totient is φ = 7107796080.

The previous prime is 21325555319. The next prime is 21325555337. The reversal of 21325555332 is 23355552312.

21325555332 is a `hidden beast` number, since 21 + 3 + 2 + 55 + 553 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21325555337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 422173 + ... + 469979.

It is an arithmetic number, because the mean of its divisors is an integer number (1497548416).

Almost surely, 2^21325555332 is an apocalyptic number.

It is an amenable number.

21325555332 is an abundant number, since it is smaller than the sum of its proper divisors (32586187644).

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

21325555332 is a wasteful number, since it uses less digits than its factorization.

21325555332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60208 (or 60203 counting only the distinct ones).

The product of its digits is 135000, while the sum is 36.

The spelling of 21325555332 in words is "twenty-one billion, three hundred twenty-five million, five hundred fifty-five thousand, three hundred thirty-two".