21113794402 has 32 divisors (see below), whose sum is σ = 34645653504. Its totient is φ = 9606988800.

The previous prime is 21113794399. The next prime is 21113794411. The reversal of 21113794402 is 20449731112.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 1289338 + ... + 1305610.

It is an arithmetic number, because the mean of its divisors is an integer number (1082676672).

Almost surely, 2^21113794402 is an apocalyptic number.

21113794402 is a deficient number, since it is larger than the sum of its proper divisors (13531859102).

21113794402 is a wasteful number, since it uses less digits than its factorization.

21113794402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17554.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 21113794402 in words is "twenty-one billion, one hundred thirteen million, seven hundred ninety-four thousand, four hundred two".