20464664420 has 48 divisors (see below), whose sum is σ = 43258634496. Its totient is φ = 8132160000.

The previous prime is 20464664401. The next prime is 20464664453. The reversal of 20464664420 is 2446646402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2072495 + ... + 2082345.

It is an arithmetic number, because the mean of its divisors is an integer number (901221552).

Almost surely, 2^20464664420 is an apocalyptic number.

20464664420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20464664420 is an abundant number, since it is smaller than the sum of its proper divisors (22793970076).

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

20464664420 is a wasteful number, since it uses less digits than its factorization.

20464664420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10532 (or 10530 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 20464664420 in words is "twenty billion, four hundred sixty-four million, six hundred sixty-four thousand, four hundred twenty".