20051525144 has 32 divisors (see below), whose sum is σ = 44128843680. Its totient is φ = 8361252864.

The previous prime is 20051525141. The next prime is 20051525173. The reversal of 20051525144 is 44152515002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20051525141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4836617 + ... + 4840760.

It is an arithmetic number, because the mean of its divisors is an integer number (1379026365).

Almost surely, 2^20051525144 is an apocalyptic number.

It is an amenable number.

20051525144 is an abundant number, since it is smaller than the sum of its proper divisors (24077318536).

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

20051525144 is a wasteful number, since it uses less digits than its factorization.

20051525144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9677427 (or 9677423 counting only the distinct ones).

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

The spelling of 20051525144 in words is "twenty billion, fifty-one million, five hundred twenty-five thousand, one hundred forty-four".