18771904346 has 16 divisors (see below), whose sum is σ = 30493260000. Its totient is φ = 8615551728.

The previous prime is 18771904343. The next prime is 18771904367. The reversal of 18771904346 is 64340917781.

It is a junction number, because it is equal to n+sod(n) for n = 18771904294 and 18771904303.

It is not an unprimeable number, because it can be changed into a prime (18771904343) 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, 2012096 + ... + 2021403.

It is an arithmetic number, because the mean of its divisors is an integer number (1905828750).

Almost surely, 2^18771904346 is an apocalyptic number.

18771904346 is a deficient number, since it is larger than the sum of its proper divisors (11721355654).

18771904346 is a wasteful number, since it uses less digits than its factorization.

18771904346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033693.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 18771904346 in words is "eighteen billion, seven hundred seventy-one million, nine hundred four thousand, three hundred forty-six".