21889950371 has 8 divisors (see below), whose sum is σ = 21929107200. Its totient is φ = 21850819848.

The previous prime is 21889950367. The next prime is 21889950373. The reversal of 21889950371 is 17305998812.

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 21889950371 - 2² = 21889950367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21889950373) 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, 2393810 + ... + 2402936.

It is an arithmetic number, because the mean of its divisors is an integer number (2741138400).

Almost surely, 2^21889950371 is an apocalyptic number.

21889950371 is a deficient number, since it is larger than the sum of its proper divisors (39156829).

21889950371 is an equidigital number, since it uses as much as digits as its factorization.

21889950371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13153.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 21889950371 in words is "twenty-one billion, eight hundred eighty-nine million, nine hundred fifty thousand, three hundred seventy-one".