20310394920 has 32 divisors (see below), whose sum is σ = 60931185120. Its totient is φ = 5416105280.

The previous prime is 20310394913. The next prime is 20310394931. The reversal of 20310394920 is 2949301302.

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, 84626526 + ... + 84626765.

It is an arithmetic number, because the mean of its divisors is an integer number (1904099535).

Almost surely, 2^20310394920 is an apocalyptic number.

20310394920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20310394920 is an abundant number, since it is smaller than the sum of its proper divisors (40620790200).

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

20310394920 is a wasteful number, since it uses less digits than its factorization.

20310394920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169253305 (or 169253301 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The spelling of 20310394920 in words is "twenty billion, three hundred ten million, three hundred ninety-four thousand, nine hundred twenty".