20186266488 has 32 divisors (see below), whose sum is σ = 50662046160. Its totient is φ = 6702571520.

The previous prime is 20186266481. The next prime is 20186266561. The reversal of 20186266488 is 88466268102.

It is a self number, because there is not a number n which added to its sum of digits gives 20186266488.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20186266481) 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, 1630203 + ... + 1642538.

Almost surely, 2^20186266488 is an apocalyptic number.

It is an amenable number.

20186266488 is an abundant number, since it is smaller than the sum of its proper divisors (30475779672).

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

20186266488 is a wasteful number, since it uses less digits than its factorization.

20186266488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273007 (or 3273003 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 51.

The spelling of 20186266488 in words is "twenty billion, one hundred eighty-six million, two hundred sixty-six thousand, four hundred eighty-eight".