18709988053 has 4 divisors (see below), whose sum is σ = 18719293888. Its totient is φ = 18700682220.

The previous prime is 18709988039. The next prime is 18709988081. The reversal of 18709988053 is 35088990781.

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.

It is a cyclic number.

It is not a de Polignac number, because 18709988053 - 2¹⁷ = 18709856981 is a prime.

It is a super-4 number, since 4×18709988053⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18709988953) 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, 4649901 + ... + 4653922.

It is an arithmetic number, because the mean of its divisors is an integer number (4679823472).

Almost surely, 2^18709988053 is an apocalyptic number.

It is an amenable number.

18709988053 is a deficient number, since it is larger than the sum of its proper divisors (9305835).

18709988053 is an equidigital number, since it uses as much as digits as its factorization.

18709988053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9305834.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 18709988053 in words is "eighteen billion, seven hundred nine million, nine hundred eighty-eight thousand, fifty-three".