20025255560 has 16 divisors (see below), whose sum is σ = 45056825100. Its totient is φ = 8010102208.

The previous prime is 20025255559. The next prime is 20025255577. The reversal of 20025255560 is 6555252002.

It can be written as a sum of positive squares in 2 ways, for example, as 17265434404 + 2759821156 = 131398^2 + 52534^2 .

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, 250315655 + ... + 250315734.

Almost surely, 2^20025255560 is an apocalyptic number.

20025255560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20025255560 is an abundant number, since it is smaller than the sum of its proper divisors (25031569540).

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

20025255560 is a wasteful number, since it uses less digits than its factorization.

20025255560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500631400 (or 500631396 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 20025255560 in words is "twenty billion, twenty-five million, two hundred fifty-five thousand, five hundred sixty".