20713732390 has 32 divisors (see below), whose sum is σ = 40833344160. Its totient is φ = 7518514944.

The previous prime is 20713732343. The next prime is 20713732411. The reversal of 20713732390 is 9323731702.

It is a super-2 number, since 2×20713732390² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 1342639 + ... + 1357978.

It is an arithmetic number, because the mean of its divisors is an integer number (1276042005).

Almost surely, 2^20713732390 is an apocalyptic number.

20713732390 is a deficient number, since it is larger than the sum of its proper divisors (20119611770).

20713732390 is a wasteful number, since it uses less digits than its factorization.

20713732390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700696.

The product of its (nonzero) digits is 47628, while the sum is 37.

The spelling of 20713732390 in words is "twenty billion, seven hundred thirteen million, seven hundred thirty-two thousand, three hundred ninety".