31950186136 has 64 divisors (see below), whose sum is σ = 69013180800. Its totient is φ = 13714272000.

The previous prime is 31950186133. The next prime is 31950186143. The reversal of 31950186136 is 63168105913.

It is a happy number.

It is a super-2 number, since 2×31950186136² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31950186092 and 31950186101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31950186133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492811 + ... + 553861.

It is an arithmetic number, because the mean of its divisors is an integer number (1078330950).

Almost surely, 2^31950186136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31950186136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34506590400).

31950186136 is an abundant number, since it is smaller than the sum of its proper divisors (37062994664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31950186136 is a wasteful number, since it uses less digits than its factorization.

31950186136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61400 (or 61396 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 31950186136 in words is "thirty-one billion, nine hundred fifty million, one hundred eighty-six thousand, one hundred thirty-six".