18751951039 has 2 divisors, whose sum is σ = 18751951040. Its totient is φ = 18751951038.

The previous prime is 18751951033. The next prime is 18751951091. The reversal of 18751951039 is 93015915781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18751951039 - 2⁷ = 18751950911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18751950983 and 18751951001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18751951033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9375975519 + 9375975520.

It is an arithmetic number, because the mean of its divisors is an integer number (9375975520).

Almost surely, 2^18751951039 is an apocalyptic number.

18751951039 is a deficient number, since it is larger than the sum of its proper divisors (1).

18751951039 is an equidigital number, since it uses as much as digits as its factorization.

18751951039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 49.

The spelling of 18751951039 in words is "eighteen billion, seven hundred fifty-one million, nine hundred fifty-one thousand, thirty-nine".