18750689431 has 2 divisors, whose sum is σ = 18750689432. Its totient is φ = 18750689430.

The previous prime is 18750689381. The next prime is 18750689437. The reversal of 18750689431 is 13498605781.

It is a strong prime.

It is an emirp because it is prime and its reverse (13498605781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18750689431 - 2¹³ = 18750681239 is a prime.

It is a super-2 number, since 2×18750689431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18750689437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9375344715 + 9375344716.

It is an arithmetic number, because the mean of its divisors is an integer number (9375344716).

Almost surely, 2^18750689431 is an apocalyptic number.

18750689431 is a deficient number, since it is larger than the sum of its proper divisors (1).

18750689431 is an equidigital number, since it uses as much as digits as its factorization.

18750689431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 18750689431 in words is "eighteen billion, seven hundred fifty million, six hundred eighty-nine thousand, four hundred thirty-one".