20920039290 has 80 divisors (see below), whose sum is σ = 56277603360. Its totient is φ = 5576104800.

The previous prime is 20920039277. The next prime is 20920039297. The reversal of 20920039290 is 9293002902.

It is not an unprimeable number, because it can be changed into a prime (20920039297) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2304781 + ... + 2313839.

It is an arithmetic number, because the mean of its divisors is an integer number (703470042).

Almost surely, 2^20920039290 is an apocalyptic number.

20920039290 is an abundant number, since it is smaller than the sum of its proper divisors (35357564070).

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

20920039290 is a wasteful number, since it uses less digits than its factorization.

20920039290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11929 (or 11920 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The spelling of 20920039290 in words is "twenty billion, nine hundred twenty million, thirty-nine thousand, two hundred ninety".