20187461250 has 160 divisors (see below), whose sum is σ = 61155673920. Its totient is φ = 4893840000.

The previous prime is 20187461213. The next prime is 20187461251. The reversal of 20187461250 is 5216478102.

20187461250 is a `hidden beast` number, since 20 + 18 + 7 + 4 + 612 + 5 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (20187461251) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 344062 + ... + 398438.

It is an arithmetic number, because the mean of its divisors is an integer number (382222962).

Almost surely, 2^20187461250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20187461250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30577836960).

20187461250 is an abundant number, since it is smaller than the sum of its proper divisors (40968212670).

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

20187461250 is a wasteful number, since it uses less digits than its factorization.

20187461250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54419 (or 54398 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 20187461250 in words is "twenty billion, one hundred eighty-seven million, four hundred sixty-one thousand, two hundred fifty".