18512652097 has 4 divisors (see below), whose sum is σ = 18551301120. Its totient is φ = 18474003076.

The previous prime is 18512652079. The next prime is 18512652143. The reversal of 18512652097 is 79025621581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79025621581 = 259387 ⋅304663.

It is a cyclic number.

It is not a de Polignac number, because 18512652097 - 2¹¹ = 18512650049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18512652497) 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, 19323793 + ... + 19324750.

It is an arithmetic number, because the mean of its divisors is an integer number (4637825280).

Almost surely, 2^18512652097 is an apocalyptic number.

It is an amenable number.

18512652097 is a deficient number, since it is larger than the sum of its proper divisors (38649023).

18512652097 is an equidigital number, since it uses as much as digits as its factorization.

18512652097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38649022.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 18512652097 in words is "eighteen billion, five hundred twelve million, six hundred fifty-two thousand, ninety-seven".