20662512020 has 24 divisors (see below), whose sum is σ = 43444812768. Its totient is φ = 8254807200.

The previous prime is 20662512007. The next prime is 20662512043. The reversal of 20662512020 is 2021526602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620726 + ... + 653165.

It is an arithmetic number, because the mean of its divisors is an integer number (1810200532).

Almost surely, 2^20662512020 is an apocalyptic number.

20662512020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20662512020 is an abundant number, since it is smaller than the sum of its proper divisors (22782300748).

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

20662512020 is a wasteful number, since it uses less digits than its factorization.

20662512020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274711 (or 1274709 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 20662512020 in words is "twenty billion, six hundred sixty-two million, five hundred twelve thousand, twenty".