20212973064 has 32 divisors (see below), whose sum is σ = 56147148000. Its totient is φ = 6737657616.

The previous prime is 20212973057. The next prime is 20212973069. The reversal of 20212973064 is 46037921202.

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

It is not an unprimeable number, because it can be changed into a prime (20212973069) 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, 46789074 + ... + 46789505.

It is an arithmetic number, because the mean of its divisors is an integer number (1754598375).

Almost surely, 2^20212973064 is an apocalyptic number.

20212973064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20212973064 is an abundant number, since it is smaller than the sum of its proper divisors (35934174936).

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

20212973064 is a wasteful number, since it uses less digits than its factorization.

20212973064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93578594 (or 93578584 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 20212973064 in words is "twenty billion, two hundred twelve million, nine hundred seventy-three thousand, sixty-four".