20181374898 has 16 divisors (see below), whose sum is σ = 40406208480. Its totient is φ = 6719881856.

The previous prime is 20181374887. The next prime is 20181374903. The reversal of 20181374898 is 89847318102.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20181374898.

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, 1804740 + ... + 1815887.

It is an arithmetic number, because the mean of its divisors is an integer number (2525388030).

Almost surely, 2^20181374898 is an apocalyptic number.

20181374898 is an abundant number, since it is smaller than the sum of its proper divisors (20224833582).

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

20181374898 is a wasteful number, since it uses less digits than its factorization.

20181374898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621561.

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 20181374898 in words is "twenty billion, one hundred eighty-one million, three hundred seventy-four thousand, eight hundred ninety-eight".