18739897399846 has 32 divisors (see below), whose sum is σ = 32183400218112. Its totient is φ = 8016920550720.

The previous prime is 18739897399793. The next prime is 18739897399859. The reversal of 18739897399846 is 64899379893781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206575570 + ... + 206666266.

It is an arithmetic number, because the mean of its divisors is an integer number (1005731256816).

Almost surely, 2^{18739897399846} is an apocalyptic number.

18739897399846 is a deficient number, since it is larger than the sum of its proper divisors (13443502818266).

18739897399846 is a wasteful number, since it uses less digits than its factorization.

18739897399846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117124.

The product of its digits is 35554111488, while the sum is 91.

The spelling of 18739897399846 in words is "eighteen trillion, seven hundred thirty-nine billion, eight hundred ninety-seven million, three hundred ninety-nine thousand, eight hundred forty-six".