18703253957 has 4 divisors (see below), whose sum is σ = 18706450956. Its totient is φ = 18700056960.

The previous prime is 18703253951. The next prime is 18703253977. The reversal of 18703253957 is 75935230781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10267566241 + 8435687716 = 101329^2 + 91846^2 .

It is a cyclic number.

It is not a de Polignac number, because 18703253957 - 2⁶ = 18703253893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18703253951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589708 + ... + 1601429.

It is an arithmetic number, because the mean of its divisors is an integer number (4676612739).

Almost surely, 2^18703253957 is an apocalyptic number.

It is an amenable number.

18703253957 is a deficient number, since it is larger than the sum of its proper divisors (3196999).

18703253957 is an equidigital number, since it uses as much as digits as its factorization.

18703253957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196998.

The product of its (nonzero) digits is 1587600, while the sum is 50.

The spelling of 18703253957 in words is "eighteen billion, seven hundred three million, two hundred fifty-three thousand, nine hundred fifty-seven".