16812332399 has 4 divisors (see below), whose sum is σ = 16817584536. Its totient is φ = 16807080264.

The previous prime is 16812332387. The next prime is 16812332401. The reversal of 16812332399 is 99323321861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99323321861 = 225601 ⋅440261.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16812332399 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 (16812331399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2621264 + ... + 2627669.

It is an arithmetic number, because the mean of its divisors is an integer number (4204396134).

Almost surely, 2^16812332399 is an apocalyptic number.

16812332399 is a deficient number, since it is larger than the sum of its proper divisors (5252137).

16812332399 is an equidigital number, since it uses as much as digits as its factorization.

16812332399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252136.

The product of its digits is 419904, while the sum is 47.

The spelling of 16812332399 in words is "sixteen billion, eight hundred twelve million, three hundred thirty-two thousand, three hundred ninety-nine".