20311111542 has 8 divisors (see below), whose sum is σ = 40622223096. Its totient is φ = 6770370512.

The previous prime is 20311111531. The next prime is 20311111577. The reversal of 20311111542 is 24511111302.

It is a sphenic number, since it is the product of 3 distinct primes.

20311111542 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692592623 + ... + 1692592634.

It is an arithmetic number, because the mean of its divisors is an integer number (5077777887).

Almost surely, 2^20311111542 is an apocalyptic number.

20311111542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20311111542 is a wasteful number, since it uses less digits than its factorization.

20311111542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385185262.

The product of its (nonzero) digits is 240, while the sum is 21.

Subtracting from 20311111542 its product of nonzero digits (240), we obtain a palindrome (20311111302).

Adding to 20311111542 its reverse (24511111302), we get a palindrome (44822222844).

The spelling of 20311111542 in words is "twenty billion, three hundred eleven million, one hundred eleven thousand, five hundred forty-two".