18709265712 has 20 divisors (see below), whose sum is σ = 48332269880. Its totient is φ = 6236421888.

The previous prime is 18709265647. The next prime is 18709265717. The reversal of 18709265712 is 21756290781.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 389776369 = 18709265712 / (1 + 8 + 7 + 0 + 9 + 2 + 6 + 5 + 7 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (18709265717) 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, 194888137 + ... + 194888232.

It is an arithmetic number, because the mean of its divisors is an integer number (2416613494).

Almost surely, 2^18709265712 is an apocalyptic number.

18709265712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18709265712 is an abundant number, since it is smaller than the sum of its proper divisors (29623004168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18709265712 is a wasteful number, since it uses less digits than its factorization.

18709265712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389776380 (or 389776374 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 18709265712 in words is "eighteen billion, seven hundred nine million, two hundred sixty-five thousand, seven hundred twelve".