18532790531 has 2 divisors, whose sum is σ = 18532790532. Its totient is φ = 18532790530.

The previous prime is 18532790501. The next prime is 18532790593. The reversal of 18532790531 is 13509723581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18532790531 - 2¹⁰ = 18532789507 is a prime.

It is a super-2 number, since 2×18532790531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18532790501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9266395265 + 9266395266.

It is an arithmetic number, because the mean of its divisors is an integer number (9266395266).

Almost surely, 2^18532790531 is an apocalyptic number.

18532790531 is a deficient number, since it is larger than the sum of its proper divisors (1).

18532790531 is an equidigital number, since it uses as much as digits as its factorization.

18532790531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 18532790531 in words is "eighteen billion, five hundred thirty-two million, seven hundred ninety thousand, five hundred thirty-one".