21337959149 has 12 divisors (see below), whose sum is σ = 23362279668. Its totient is φ = 19373639040.

The previous prime is 21337959143. The next prime is 21337959151. The reversal of 21337959149 is 94195973312.

It can be written as a sum of positive squares in 6 ways, for example, as 8722626025 + 12615333124 = 93395^2 + 112318^2 .

It is not a de Polignac number, because 21337959149 - 2¹⁶ = 21337893613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21337959149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21337959143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172184 + ... + 268929.

It is an arithmetic number, because the mean of its divisors is an integer number (1946856639).

Almost surely, 2^21337959149 is an apocalyptic number.

It is an amenable number.

21337959149 is a deficient number, since it is larger than the sum of its proper divisors (2024320519).

21337959149 is an equidigital number, since it uses as much as digits as its factorization.

21337959149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441248 (or 441187 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 53.

The spelling of 21337959149 in words is "twenty-one billion, three hundred thirty-seven million, nine hundred fifty-nine thousand, one hundred forty-nine".