21023064908 has 12 divisors (see below), whose sum is σ = 36791379072. Its totient is φ = 10511242320.

The previous prime is 21023064901. The next prime is 21023064911. The reversal of 21023064908 is 80946032012.

It is not an unprimeable number, because it can be changed into a prime (21023064901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243398 + ... + 318258.

It is an arithmetic number, because the mean of its divisors is an integer number (3065948256).

Almost surely, 2^21023064908 is an apocalyptic number.

It is an amenable number.

21023064908 is a deficient number, since it is larger than the sum of its proper divisors (15768314164).

21023064908 is a wasteful number, since it uses less digits than its factorization.

21023064908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145072 (or 145070 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 21023064908 in words is "twenty-one billion, twenty-three million, sixty-four thousand, nine hundred eight".