20390939710 has 16 divisors (see below), whose sum is σ = 37046718576. Its totient is φ = 8080147648.

The previous prime is 20390939687. The next prime is 20390939711. The reversal of 20390939710 is 1793909302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20390939711) by changing a digit.

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, 9527407 + ... + 9529546.

It is an arithmetic number, because the mean of its divisors is an integer number (2315419911).

Almost surely, 2^20390939710 is an apocalyptic number.

20390939710 is a deficient number, since it is larger than the sum of its proper divisors (16655778866).

20390939710 is a wasteful number, since it uses less digits than its factorization.

20390939710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19057067.

The product of its (nonzero) digits is 91854, while the sum is 43.

The spelling of 20390939710 in words is "twenty billion, three hundred ninety million, nine hundred thirty-nine thousand, seven hundred ten".