18780094898 has 4 divisors (see below), whose sum is σ = 28170142350. Its totient is φ = 9390047448.

The previous prime is 18780094867. The next prime is 18780094919. The reversal of 18780094898 is 89849008781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18182634649 + 597460249 = 134843^2 + 24443^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18780094898.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4695023723 + ... + 4695023726.

Almost surely, 2^18780094898 is an apocalyptic number.

18780094898 is a deficient number, since it is larger than the sum of its proper divisors (9390047452).

18780094898 is an equidigital number, since it uses as much as digits as its factorization.

18780094898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9390047451.

The product of its (nonzero) digits is 9289728, while the sum is 62.

The spelling of 18780094898 in words is "eighteen billion, seven hundred eighty million, ninety-four thousand, eight hundred ninety-eight".