21425633960 has 32 divisors (see below), whose sum is σ = 48211842600. Its totient is φ = 8569512960.

The previous prime is 21425633959. The next prime is 21425633989. The reversal of 21425633960 is 6933652412.

It can be written as a sum of positive squares in 4 ways, for example, as 12551617156 + 8874016804 = 112034^2 + 94202^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905156 + ... + 928524.

Almost surely, 2^21425633960 is an apocalyptic number.

21425633960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21425633960 is an abundant number, since it is smaller than the sum of its proper divisors (26786208640).

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

21425633960 is a wasteful number, since it uses less digits than its factorization.

21425633960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46301 (or 46297 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 21425633960 in words is "twenty-one billion, four hundred twenty-five million, six hundred thirty-three thousand, nine hundred sixty".