18912121161574 has 8 divisors (see below), whose sum is σ = 28373399375328. Its totient is φ = 9454321369800.

The previous prime is 18912121161559. The next prime is 18912121161587. The reversal of 18912121161574 is 47516112121981.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869591902 + ... + 869613649.

It is an arithmetic number, because the mean of its divisors is an integer number (3546674921916).

Almost surely, 2^{18912121161574} is an apocalyptic number.

18912121161574 is a deficient number, since it is larger than the sum of its proper divisors (9461278213754).

18912121161574 is a wasteful number, since it uses less digits than its factorization.

18912121161574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739210990.

The product of its digits is 241920, while the sum is 49.

The spelling of 18912121161574 in words is "eighteen trillion, nine hundred twelve billion, one hundred twenty-one million, one hundred sixty-one thousand, five hundred seventy-four".