31436618963 has 4 divisors (see below), whose sum is σ = 31455824400. Its totient is φ = 31417413528.

The previous prime is 31436618881. The next prime is 31436618971. The reversal of 31436618963 is 36981663413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36981663413 = 137 ⋅269939149.

It is a cyclic number.

It is not a de Polignac number, because 31436618963 - 2²² = 31432424659 is a prime.

It is a super-2 number, since 2×31436618963² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31436618363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9600263 + ... + 9603536.

It is an arithmetic number, because the mean of its divisors is an integer number (7863956100).

Almost surely, 2^31436618963 is an apocalyptic number.

31436618963 is a deficient number, since it is larger than the sum of its proper divisors (19205437).

31436618963 is a wasteful number, since it uses less digits than its factorization.

31436618963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19205436.

The product of its digits is 1679616, while the sum is 50.

The spelling of 31436618963 in words is "thirty-one billion, four hundred thirty-six million, six hundred eighteen thousand, nine hundred sixty-three".