18615601420 has 48 divisors (see below), whose sum is σ = 42112677600. Its totient is φ = 6871366656.

The previous prime is 18615601397. The next prime is 18615601423. The reversal of 18615601420 is 2410651681.

It is not an unprimeable number, because it can be changed into a prime (18615601423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1043899 + ... + 1061581.

It is an arithmetic number, because the mean of its divisors is an integer number (877347450).

Almost surely, 2^18615601420 is an apocalyptic number.

18615601420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18615601420 is an abundant number, since it is smaller than the sum of its proper divisors (23497076180).

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

18615601420 is a wasteful number, since it uses less digits than its factorization.

18615601420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21754 (or 21752 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 18615601420 in words is "eighteen billion, six hundred fifteen million, six hundred one thousand, four hundred twenty".