18290939031 has 24 divisors (see below), whose sum is σ = 26542277424. Its totient is φ = 12137771520.

The previous prime is 18290938993. The next prime is 18290939053. The reversal of 18290939031 is 13093909281.

It is a happy number.

It is not a de Polignac number, because 18290939031 - 2⁷ = 18290938903 is a prime.

It is a super-2 number, since 2×18290939031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18290929031) 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, 1764295 + ... + 1774631.

It is an arithmetic number, because the mean of its divisors is an integer number (1105928226).

Almost surely, 2^18290939031 is an apocalyptic number.

18290939031 is a deficient number, since it is larger than the sum of its proper divisors (8251338393).

18290939031 is a wasteful number, since it uses less digits than its factorization.

18290939031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11231 (or 11228 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 18290939031 in words is "eighteen billion, two hundred ninety million, nine hundred thirty-nine thousand, thirty-one".