21238080408042 has 64 divisors (see below), whose sum is σ = 43191796008960. Its totient is φ = 6961171968000.

The previous prime is 21238080408023. The next prime is 21238080408059. The reversal of 21238080408042 is 24080408083212.

It is a junction number, because it is equal to n+sod(n) for n = 21238080407985 and 21238080408003.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70802634 + ... + 71101962.

It is an arithmetic number, because the mean of its divisors is an integer number (674871812640).

Almost surely, 2^{21238080408042} is an apocalyptic number.

21238080408042 is an abundant number, since it is smaller than the sum of its proper divisors (21953715600918).

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

21238080408042 is a wasteful number, since it uses less digits than its factorization.

21238080408042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300239.

The product of its (nonzero) digits is 196608, while the sum is 42.

The spelling of 21238080408042 in words is "twenty-one trillion, two hundred thirty-eight billion, eighty million, four hundred eight thousand, forty-two".