20015651466 has 24 divisors (see below), whose sum is σ = 43397648580. Its totient is φ = 6667206336.

The previous prime is 20015651449. The next prime is 20015651497. The reversal of 20015651466 is 66415651002.

20015651466 is a `hidden beast` number, since 20 + 0 + 1 + 565 + 14 + 66 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19581804225 + 433847241 = 139935^2 + 20829^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20015651466.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 363355 + ... + 414798.

Almost surely, 2^20015651466 is an apocalyptic number.

20015651466 is an abundant number, since it is smaller than the sum of its proper divisors (23381997114).

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

20015651466 is a wasteful number, since it uses less digits than its factorization.

20015651466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779590 (or 779587 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 20015651466 in words is "twenty billion, fifteen million, six hundred fifty-one thousand, four hundred sixty-six".