20307706620 has 24 divisors (see below), whose sum is σ = 56861578704. Its totient is φ = 5415388416.

The previous prime is 20307706613. The next prime is 20307706667. The reversal of 20307706620 is 2660770302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169230829 + ... + 169230948.

It is an arithmetic number, because the mean of its divisors is an integer number (2369232446).

Almost surely, 2^20307706620 is an apocalyptic number.

20307706620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20307706620 is an abundant number, since it is smaller than the sum of its proper divisors (36553872084).

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

20307706620 is a wasteful number, since it uses less digits than its factorization.

20307706620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338461789 (or 338461787 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 33.

The spelling of 20307706620 in words is "twenty billion, three hundred seven million, seven hundred six thousand, six hundred twenty".