20007706720 has 48 divisors (see below), whose sum is σ = 47298964608. Its totient is φ = 7997875200.

The previous prime is 20007706699. The next prime is 20007706723. The reversal of 20007706720 is 2760770002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20007706723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210820 + ... + 290620.

It is an arithmetic number, because the mean of its divisors is an integer number (985395096).

Almost surely, 2^20007706720 is an apocalyptic number.

20007706720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20007706720 is an abundant number, since it is smaller than the sum of its proper divisors (27291257888).

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

20007706720 is a wasteful number, since it uses less digits than its factorization.

20007706720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81383 (or 81375 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The spelling of 20007706720 in words is "twenty billion, seven million, seven hundred six thousand, seven hundred twenty".