21889833 has 8 divisors (see below), whose sum is σ = 33355968. Its totient is φ = 12508464.

The previous prime is 21889823. The next prime is 21889841. The reversal of 21889833 is 33898812.

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

It is not a de Polignac number, because 21889833 - 2⁹ = 21889321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21889823) 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, 521166 + ... + 521207.

It is an arithmetic number, because the mean of its divisors is an integer number (4169496).

Almost surely, 2^21889833 is an apocalyptic number.

It is an amenable number.

21889833 is a deficient number, since it is larger than the sum of its proper divisors (11466135).

21889833 is a wasteful number, since it uses less digits than its factorization.

21889833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042383.

The product of its digits is 82944, while the sum is 42.

The square root of 21889833 is about 4678.6571791487. The cubic root of 21889833 is about 279.7354346210.

It can be divided in two parts, 21889 and 833, that added together give a palindrome (22722).

The spelling of 21889833 in words is "twenty-one million, eight hundred eighty-nine thousand, eight hundred thirty-three".