18052197657 has 32 divisors (see below), whose sum is σ = 27169701888. Its totient is φ = 10578275136.

The previous prime is 18052197641. The next prime is 18052197671. The reversal of 18052197657 is 75679125081.

It is not a de Polignac number, because 18052197657 - 2⁴ = 18052197641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18052197697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154908 + ... + 245154.

It is an arithmetic number, because the mean of its divisors is an integer number (849053184).

Almost surely, 2^18052197657 is an apocalyptic number.

It is an amenable number.

18052197657 is a deficient number, since it is larger than the sum of its proper divisors (9117504231).

18052197657 is a wasteful number, since it uses less digits than its factorization.

18052197657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90509.

The product of its (nonzero) digits is 1058400, while the sum is 51.

The spelling of 18052197657 in words is "eighteen billion, fifty-two million, one hundred ninety-seven thousand, six hundred fifty-seven".