18534791975 has 12 divisors (see below), whose sum is σ = 26266448304. Its totient is φ = 12709571520.

The previous prime is 18534791969. The next prime is 18534791981. The reversal of 18534791975 is 57919743581.

It is an interprime number because it is at equal distance from previous prime (18534791969) and next prime (18534791981).

It is not a de Polignac number, because 18534791975 - 2⁶ = 18534791911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52956374 + ... + 52956723.

It is an arithmetic number, because the mean of its divisors is an integer number (2188870692).

Almost surely, 2^18534791975 is an apocalyptic number.

18534791975 is a deficient number, since it is larger than the sum of its proper divisors (7731656329).

18534791975 is a wasteful number, since it uses less digits than its factorization.

18534791975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105913114 (or 105913109 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 59.

The spelling of 18534791975 in words is "eighteen billion, five hundred thirty-four million, seven hundred ninety-one thousand, nine hundred seventy-five".