18874731797 has 8 divisors (see below), whose sum is σ = 20000094336. Its totient is φ = 17751045312.

The previous prime is 18874731787. The next prime is 18874731817. The reversal of 18874731797 is 79713747881.

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

It is not a de Polignac number, because 18874731797 - 2⁸ = 18874731541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18874731787) 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, 395783 + ... + 440900.

It is an arithmetic number, because the mean of its divisors is an integer number (2500011792).

Almost surely, 2^18874731797 is an apocalyptic number.

18874731797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18874731797 is a deficient number, since it is larger than the sum of its proper divisors (1125362539).

18874731797 is a wasteful number, since it uses less digits than its factorization.

18874731797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838027.

The product of its digits is 16595712, while the sum is 62.

The spelling of 18874731797 in words is "eighteen billion, eight hundred seventy-four million, seven hundred thirty-one thousand, seven hundred ninety-seven".