20313111042 has 32 divisors (see below), whose sum is σ = 51588854400. Its totient is φ = 5803745904.

The previous prime is 20313111041. The next prime is 20313111187. The reversal of 20313111042 is 24011131302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20313111041) 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, 26868817 + ... + 26869572.

It is an arithmetic number, because the mean of its divisors is an integer number (1612151700).

Almost surely, 2^20313111042 is an apocalyptic number.

20313111042 is an abundant number, since it is smaller than the sum of its proper divisors (31275743358).

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

20313111042 is a wasteful number, since it uses less digits than its factorization.

20313111042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53738407 (or 53738401 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20313111042 its reverse (24011131302), we get a palindrome (44324242344).

The spelling of 20313111042 in words is "twenty billion, three hundred thirteen million, one hundred eleven thousand, forty-two".