18714160621 has 4 divisors (see below), whose sum is σ = 20153711452. Its totient is φ = 17274609792.

The previous prime is 18714160601. The next prime is 18714160639. The reversal of 18714160621 is 12606141781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12606141781 = 881 ⋅14308901.

It can be written as a sum of positive squares in 2 ways, for example, as 881496100 + 17832664521 = 29690^2 + 133539^2 .

It is a cyclic number.

It is not a de Polignac number, because 18714160621 - 2⁹ = 18714160109 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 (18714160601) 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, 719775396 + ... + 719775421.

It is an arithmetic number, because the mean of its divisors is an integer number (5038427863).

Almost surely, 2^18714160621 is an apocalyptic number.

It is an amenable number.

18714160621 is a deficient number, since it is larger than the sum of its proper divisors (1439550831).

18714160621 is a wasteful number, since it uses less digits than its factorization.

18714160621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439550830.

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 18714160621 in words is "eighteen billion, seven hundred fourteen million, one hundred sixty thousand, six hundred twenty-one".