20251545140 has 24 divisors (see below), whose sum is σ = 42606877992. Its totient is φ = 8085640320.

The previous prime is 20251545053. The next prime is 20251545169. The reversal of 20251545140 is 4154515202.

It can be written as a sum of positive squares in 4 ways, for example, as 344028304 + 19907516836 = 18548^2 + 141094^2 .

It is a congruent number.

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, 925019 + ... + 946658.

It is an arithmetic number, because the mean of its divisors is an integer number (1775286583).

Almost surely, 2^20251545140 is an apocalyptic number.

20251545140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20251545140 is an abundant number, since it is smaller than the sum of its proper divisors (22355332852).

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

20251545140 is a wasteful number, since it uses less digits than its factorization.

20251545140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872227 (or 1872225 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 20251545140 in words is "twenty billion, two hundred fifty-one million, five hundred forty-five thousand, one hundred forty".