20466866502 has 12 divisors (see below), whose sum is σ = 44344877460. Its totient is φ = 6822288828.

The previous prime is 20466866501. The next prime is 20466866507. The reversal of 20466866502 is 20566866402.

20466866502 is a `hidden beast` number, since 2 + 0 + 4 + 66 + 86 + 6 + 502 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20466866501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568524052 + ... + 568524087.

It is an arithmetic number, because the mean of its divisors is an integer number (3695406455).

Almost surely, 2^20466866502 is an apocalyptic number.

20466866502 is an abundant number, since it is smaller than the sum of its proper divisors (23878010958).

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

20466866502 is a wasteful number, since it uses less digits than its factorization.

20466866502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137048147 (or 1137048144 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 20466866502 in words is "twenty billion, four hundred sixty-six million, eight hundred sixty-six thousand, five hundred two".