19003364818 has 16 divisors (see below), whose sum is σ = 29891931480. Its totient is φ = 9048364416.

The previous prime is 19003364803. The next prime is 19003364869. The reversal of 19003364818 is 81846330091.

It can be written as a sum of positive squares in 4 ways, for example, as 18243094489 + 760270329 = 135067^2 + 27573^2 .

It is a super-2 number, since 2×19003364818² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2239905 + ... + 2248372.

Almost surely, 2^19003364818 is an apocalyptic number.

19003364818 is a deficient number, since it is larger than the sum of its proper divisors (10888566662).

19003364818 is a wasteful number, since it uses less digits than its factorization.

19003364818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4488381.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 19003364818 in words is "nineteen billion, three million, three hundred sixty-four thousand, eight hundred eighteen".