31126622018 has 6 divisors (see below), whose sum is σ = 46690307289. Its totient is φ = 15563186256.

The previous prime is 31126621969. The next prime is 31126622027. The reversal of 31126622018 is 81022662113.

It can be written as a sum of positive squares in 2 ways, for example, as 17672245969 + 13454376049 = 132937^2 + 115993^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=124753.

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 187130 + ... + 311882.

Almost surely, 2^31126622018 is an apocalyptic number.

31126622018 is a deficient number, since it is larger than the sum of its proper divisors (15563685271).

31126622018 is an frugal number, since it uses more digits than its factorization.

31126622018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249508 (or 124755 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

Multiplying 31126622018 by its sum of digits (32), we get a square (996051904576 = 998024²).

The spelling of 31126622018 in words is "thirty-one billion, one hundred twenty-six million, six hundred twenty-two thousand, eighteen".