21132998 has 16 divisors (see below), whose sum is σ = 33185376. Its totient is φ = 10074240.

The previous prime is 21132983. The next prime is 21133003. The reversal of 21132998 is 89923112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19388 + ... + 20448.

It is an arithmetic number, because the mean of its divisors is an integer number (2074086).

Almost surely, 2^21132998 is an apocalyptic number.

21132998 is a deficient number, since it is larger than the sum of its proper divisors (12052378).

21132998 is a wasteful number, since it uses less digits than its factorization.

21132998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519.

The product of its digits is 7776, while the sum is 35.

The square root of 21132998 is about 4597.0640630733. The cubic root of 21132998 is about 276.4736231783.

The spelling of 21132998 in words is "twenty-one million, one hundred thirty-two thousand, nine hundred ninety-eight".