18741391377 has 8 divisors (see below), whose sum is σ = 24989546400. Its totient is φ = 12493748640.

The previous prime is 18741391363. The next prime is 18741391391. The reversal of 18741391377 is 77319314781.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18741391363) and next prime (18741391391).

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

It is not a de Polignac number, because 18741391377 - 2¹² = 18741387281 is a prime.

It is a super-2 number, since 2×18741391377² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18741391307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32524 + ... + 196317.

It is an arithmetic number, because the mean of its divisors is an integer number (3123693300).

Almost surely, 2^18741391377 is an apocalyptic number.

It is an amenable number.

18741391377 is a deficient number, since it is larger than the sum of its proper divisors (6248155023).

18741391377 is a wasteful number, since it uses less digits than its factorization.

18741391377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256143.

The product of its digits is 889056, while the sum is 51.

The spelling of 18741391377 in words is "eighteen billion, seven hundred forty-one million, three hundred ninety-one thousand, three hundred seventy-seven".