21980167399 has 8 divisors (see below), whose sum is σ = 22009403520. Its totient is φ = 21950952696.

The previous prime is 21980167381. The next prime is 21980167421. The reversal of 21980167399 is 99376108912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21980167399 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 (21980267399) 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, 3151414 + ... + 3158380.

It is an arithmetic number, because the mean of its divisors is an integer number (2751175440).

Almost surely, 2^21980167399 is an apocalyptic number.

21980167399 is a deficient number, since it is larger than the sum of its proper divisors (29236121).

21980167399 is a wasteful number, since it uses less digits than its factorization.

21980167399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10709.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The spelling of 21980167399 in words is "twenty-one billion, nine hundred eighty million, one hundred sixty-seven thousand, three hundred ninety-nine".