31800264939387 has 18 divisors (see below), whose sum is σ = 53433098232228. Its totient is φ = 18171579965112.

The previous prime is 31800264939379. The next prime is 31800264939403. The reversal of 31800264939387 is 78393946200813.

31800264939387 is a `hidden beast` number, since 3 + 180 + 0 + 2 + 6 + 49 + 39 + 387 = 666.

It is not a de Polignac number, because 31800264939387 - 2³ = 31800264939379 is a prime.

It is a super-2 number, since 2×31800264939387² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (31800264939367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36054721713 + ... + 36054722594.

It is an arithmetic number, because the mean of its divisors is an integer number (2968505457346).

Almost surely, 2^{31800264939387} is an apocalyptic number.

31800264939387 is a deficient number, since it is larger than the sum of its proper divisors (21632833292841).

31800264939387 is a wasteful number, since it uses less digits than its factorization.

31800264939387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72109444327 (or 72109444317 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 31800264939387 in words is "thirty-one trillion, eight hundred billion, two hundred sixty-four million, nine hundred thirty-nine thousand, three hundred eighty-seven".