21254325024 has 48 divisors (see below), whose sum is σ = 58218374592. Its totient is φ = 6776740608.

The previous prime is 21254324999. The next prime is 21254325077. The reversal of 21254325024 is 42052345212.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 21254324982 and 21254325000.

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, 4810819 + ... + 4815234.

It is an arithmetic number, because the mean of its divisors is an integer number (1212882804).

Almost surely, 2^21254325024 is an apocalyptic number.

21254325024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21254325024 is an abundant number, since it is smaller than the sum of its proper divisors (36964049568).

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

21254325024 is a wasteful number, since it uses less digits than its factorization.

21254325024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9626089 (or 9626081 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 21254325024 in words is "twenty-one billion, two hundred fifty-four million, three hundred twenty-five thousand, twenty-four".