21138757808314 has 8 divisors (see below), whose sum is σ = 32445535240800. Its totient is φ = 10323579394716.

The previous prime is 21138757808269. The next prime is 21138757808353. The reversal of 21138757808314 is 41380875783112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21138757808314² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122899754614 + ... + 122899754785.

It is an arithmetic number, because the mean of its divisors is an integer number (4055691905100).

Almost surely, 2^{21138757808314} is an apocalyptic number.

21138757808314 is a deficient number, since it is larger than the sum of its proper divisors (11306777432486).

21138757808314 is a wasteful number, since it uses less digits than its factorization.

21138757808314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245799509444.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 21138757808314 in words is "twenty-one trillion, one hundred thirty-eight billion, seven hundred fifty-seven million, eight hundred eight thousand, three hundred fourteen".