20499285996942 has 32 divisors (see below), whose sum is σ = 41037937804800. Its totient is φ = 6826536495168.

The previous prime is 20499285996911. The next prime is 20499285996953. The reversal of 20499285996942 is 24969958299402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38662909 + ... + 39189527.

It is an arithmetic number, because the mean of its divisors is an integer number (1282435556400).

Almost surely, 2^{20499285996942} is an apocalyptic number.

20499285996942 is an abundant number, since it is smaller than the sum of its proper divisors (20538651807858).

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

20499285996942 is a wasteful number, since it uses less digits than its factorization.

20499285996942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532840.

The product of its (nonzero) digits is 1813985280, while the sum is 78.

The spelling of 20499285996942 in words is "twenty trillion, four hundred ninety-nine billion, two hundred eighty-five million, nine hundred ninety-six thousand, nine hundred forty-two".