21103299974 has 16 divisors (see below), whose sum is σ = 32589851712. Its totient is φ = 10243027368.

The previous prime is 21103299961. The next prime is 21103299991. The reversal of 21103299974 is 47999230112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738704 + ... + 766739.

It is an arithmetic number, because the mean of its divisors is an integer number (2036865732).

Almost surely, 2^21103299974 is an apocalyptic number.

21103299974 is a deficient number, since it is larger than the sum of its proper divisors (11486551738).

21103299974 is a wasteful number, since it uses less digits than its factorization.

21103299974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505651.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 21103299974 in words is "twenty-one billion, one hundred three million, two hundred ninety-nine thousand, nine hundred seventy-four".