31487838669 has 24 divisors (see below), whose sum is σ = 53905109440. Its totient is φ = 17993049696.

The previous prime is 31487838667. The next prime is 31487838703. The reversal of 31487838669 is 96683878413.

It is not a de Polignac number, because 31487838669 - 2¹ = 31487838667 is a prime.

It is a super-2 number, since 2×31487838669² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31487838667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9253984 + ... + 9257385.

Almost surely, 2^31487838669 is an apocalyptic number.

It is an amenable number.

31487838669 is a deficient number, since it is larger than the sum of its proper divisors (22417270771).

31487838669 is an equidigital number, since it uses as much as digits as its factorization.

31487838669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18511391 (or 18511379 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 31487838669 in words is "thirty-one billion, four hundred eighty-seven million, eight hundred thirty-eight thousand, six hundred sixty-nine".