18897400893196 has 24 divisors (see below), whose sum is σ = 37824352133120. Its totient is φ = 8092553879952.

The previous prime is 18897400893181. The next prime is 18897400893253. The reversal of 18897400893196 is 69139800479881.

It is a super-2 number, since 2×18897400893196² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263805930 + ... + 263877553.

Almost surely, 2^{18897400893196} is an apocalyptic number.

It is an amenable number.

18897400893196 is an abundant number, since it is smaller than the sum of its proper divisors (18926951239924).

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

18897400893196 is a wasteful number, since it uses less digits than its factorization.

18897400893196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527684773 (or 527684771 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 73.

The spelling of 18897400893196 in words is "eighteen trillion, eight hundred ninety-seven billion, four hundred million, eight hundred ninety-three thousand, one hundred ninety-six".