20087921412 has 72 divisors (see below), whose sum is σ = 57900502296. Its totient is φ = 5817314304.

The previous prime is 20087921387. The next prime is 20087921453. The reversal of 20087921412 is 21412978002.

It can be written as a sum of positive squares in 4 ways, for example, as 1544018436 + 18543902976 = 39294^2 + 136176^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1254483 + ... + 1270394.

It is an arithmetic number, because the mean of its divisors is an integer number (804173643).

Almost surely, 2^20087921412 is an apocalyptic number.

It is an amenable number.

20087921412 is an abundant number, since it is smaller than the sum of its proper divisors (37812580884).

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

20087921412 is a wasteful number, since it uses less digits than its factorization.

20087921412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524917 (or 2524912 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 20087921412 in words is "twenty billion, eighty-seven million, nine hundred twenty-one thousand, four hundred twelve".