18467042639 has 2 divisors, whose sum is σ = 18467042640. Its totient is φ = 18467042638.

The previous prime is 18467042623. The next prime is 18467042683. The reversal of 18467042639 is 93624076481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18467042639 - 2⁴ = 18467042623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18467042689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9233521319 + 9233521320.

It is an arithmetic number, because the mean of its divisors is an integer number (9233521320).

Almost surely, 2^18467042639 is an apocalyptic number.

18467042639 is a deficient number, since it is larger than the sum of its proper divisors (1).

18467042639 is an equidigital number, since it uses as much as digits as its factorization.

18467042639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 18467042639 in words is "eighteen billion, four hundred sixty-seven million, forty-two thousand, six hundred thirty-nine".