18996364321 has 8 divisors (see below), whose sum is σ = 20725913664. Its totient is φ = 17267249520.

The previous prime is 18996364301. The next prime is 18996364327. The reversal of 18996364321 is 12346369981.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18996364321 - 2¹⁵ = 18996331553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18996364327) 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, 13606 + ... + 195391.

It is an arithmetic number, because the mean of its divisors is an integer number (2590739208).

Almost surely, 2^18996364321 is an apocalyptic number.

18996364321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18996364321 is a deficient number, since it is larger than the sum of its proper divisors (1729549343).

18996364321 is a wasteful number, since it uses less digits than its factorization.

18996364321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217271.

The product of its digits is 1679616, while the sum is 52.

The spelling of 18996364321 in words is "eighteen billion, nine hundred ninety-six million, three hundred sixty-four thousand, three hundred twenty-one".