21335318942 has 32 divisors (see below), whose sum is σ = 36950016000. Its totient is φ = 9050393088.

The previous prime is 21335318887. The next prime is 21335318951. The reversal of 21335318942 is 24981353312.

It is a self number, because there is not a number n which added to its sum of digits gives 21335318942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517859 + ... + 557537.

It is an arithmetic number, because the mean of its divisors is an integer number (1154688000).

Almost surely, 2^21335318942 is an apocalyptic number.

21335318942 is a deficient number, since it is larger than the sum of its proper divisors (15614697058).

21335318942 is a wasteful number, since it uses less digits than its factorization.

21335318942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40080.

The product of its digits is 155520, while the sum is 41.

The spelling of 21335318942 in words is "twenty-one billion, three hundred thirty-five million, three hundred eighteen thousand, nine hundred forty-two".