18906479745 has 8 divisors (see below), whose sum is σ = 30250367616. Its totient is φ = 10083455856.

The previous prime is 18906479719. The next prime is 18906479747. The reversal of 18906479745 is 54797460981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18906479745 - 2⁶ = 18906479681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18906479747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630215977 + ... + 630216006.

It is an arithmetic number, because the mean of its divisors is an integer number (3781295952).

Almost surely, 2^18906479745 is an apocalyptic number.

18906479745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18906479745 is a deficient number, since it is larger than the sum of its proper divisors (11343887871).

18906479745 is a wasteful number, since it uses less digits than its factorization.

18906479745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260431991.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 18906479745 in words is "eighteen billion, nine hundred six million, four hundred seventy-nine thousand, seven hundred forty-five".