21200998 has 32 divisors (see below), whose sum is σ = 41207040. Its totient is φ = 7944480.

The previous prime is 21200987. The next prime is 21201031. The reversal of 21200998 is 89900212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393 + ... + 6523.

It is an arithmetic number, because the mean of its divisors is an integer number (1287720).

Almost surely, 2^21200998 is an apocalyptic number.

21200998 is a deficient number, since it is larger than the sum of its proper divisors (20006042).

21200998 is a wasteful number, since it uses less digits than its factorization.

21200998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6172.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 21200998 is about 4604.4541478877. The cubic root of 21200998 is about 276.7698436162.

The spelling of 21200998 in words is "twenty-one million, two hundred thousand, nine hundred ninety-eight".