21884998 has 8 divisors (see below), whose sum is σ = 34555320. Its totient is φ = 10366560.

The previous prime is 21884987. The next prime is 21885013. The reversal of 21884998 is 89948812.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287923 + ... + 287998.

It is an arithmetic number, because the mean of its divisors is an integer number (4319415).

Almost surely, 2^21884998 is an apocalyptic number.

21884998 is a deficient number, since it is larger than the sum of its proper divisors (12670322).

21884998 is a wasteful number, since it uses less digits than its factorization.

21884998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575942.

The product of its digits is 331776, while the sum is 49.

The square root of 21884998 is about 4678.1404425263. The cubic root of 21884998 is about 279.7148372289.

The spelling of 21884998 in words is "twenty-one million, eight hundred eighty-four thousand, nine hundred ninety-eight".