20290911910 has 32 divisors (see below), whose sum is σ = 37316961792. Its totient is φ = 7940221920.

The previous prime is 20290911869. The next prime is 20290911913. The reversal of 20290911910 is 1911909202.

It is a super-2 number, since 2×20290911910² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20290911913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1252965 + ... + 1269055.

It is an arithmetic number, because the mean of its divisors is an integer number (1166155056).

Almost surely, 2^20290911910 is an apocalyptic number.

20290911910 is a deficient number, since it is larger than the sum of its proper divisors (17026049882).

20290911910 is a wasteful number, since it uses less digits than its factorization.

20290911910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18828.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 20290911910 in words is "twenty billion, two hundred ninety million, nine hundred eleven thousand, nine hundred ten".