19518149312 has 14 divisors (see below), whose sum is σ = 38731327668. Its totient is φ = 9759074624.

The previous prime is 19518149279. The next prime is 19518149353. The reversal of 19518149312 is 21394181591.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152485478 + ... + 152485605.

Almost surely, 2^19518149312 is an apocalyptic number.

It is an amenable number.

19518149312 is a deficient number, since it is larger than the sum of its proper divisors (19213178356).

19518149312 is an equidigital number, since it uses as much as digits as its factorization.

19518149312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304971095 (or 304971085 counting only the distinct ones).

The product of its digits is 77760, while the sum is 44.

The spelling of 19518149312 in words is "nineteen billion, five hundred eighteen million, one hundred forty-nine thousand, three hundred twelve".