18897049137898 has 8 divisors (see below), whose sum is σ = 28346033726208. Its totient is φ = 9448371229164.

The previous prime is 18897049137893. The next prime is 18897049137929. The reversal of 18897049137898 is 89873194079881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18897049137898² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18897049137893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76515786 + ... + 76762357.

It is an arithmetic number, because the mean of its divisors is an integer number (3543254215776).

Almost surely, 2^{18897049137898} is an apocalyptic number.

18897049137898 is a deficient number, since it is larger than the sum of its proper divisors (9448984588310).

18897049137898 is a wasteful number, since it uses less digits than its factorization.

18897049137898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153339788.

The product of its (nonzero) digits is 1755758592, while the sum is 82.

The spelling of 18897049137898 in words is "eighteen trillion, eight hundred ninety-seven billion, forty-nine million, one hundred thirty-seven thousand, eight hundred ninety-eight".