20456521012 has 24 divisors (see below), whose sum is σ = 36335174400. Its totient is φ = 10076061600.

The previous prime is 20456521009. The next prime is 20456521037. The reversal of 20456521012 is 21012565402.

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, 46828 + ... + 207619.

It is an arithmetic number, because the mean of its divisors is an integer number (1513965600).

Almost surely, 2^20456521012 is an apocalyptic number.

It is an amenable number.

20456521012 is a deficient number, since it is larger than the sum of its proper divisors (15878653388).

20456521012 is a wasteful number, since it uses less digits than its factorization.

20456521012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254751 (or 254749 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 20456521012 in words is "twenty billion, four hundred fifty-six million, five hundred twenty-one thousand, twelve".