21899113744238 has 16 divisors (see below), whose sum is σ = 32880030971760. Its totient is φ = 10939105814016.

The previous prime is 21899113744139. The next prime is 21899113744267. The reversal of 21899113744238 is 83244731199812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17838653 + ... + 19026711.

It is an arithmetic number, because the mean of its divisors is an integer number (2055001935735).

Almost surely, 2^{21899113744238} is an apocalyptic number.

21899113744238 is a deficient number, since it is larger than the sum of its proper divisors (10980917227522).

21899113744238 is a wasteful number, since it uses less digits than its factorization.

21899113744238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196851.

The product of its digits is 20901888, while the sum is 62.

The spelling of 21899113744238 in words is "twenty-one trillion, eight hundred ninety-nine billion, one hundred thirteen million, seven hundred forty-four thousand, two hundred thirty-eight".