21200994 has 16 divisors (see below), whose sum is σ = 47113440. Its totient is φ = 7066980.

The previous prime is 21200987. The next prime is 21201031. The reversal of 21200994 is 49900212.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 196252 + ... + 196359.

It is an arithmetic number, because the mean of its divisors is an integer number (2944590).

Almost surely, 2^21200994 is an apocalyptic number.

21200994 is an abundant number, since it is smaller than the sum of its proper divisors (25912446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21200994 is a wasteful number, since it uses less digits than its factorization.

21200994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392622 (or 392616 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 21200994 is about 4604.4537135256. The cubic root of 21200994 is about 276.7698262102.

The spelling of 21200994 in words is "twenty-one million, two hundred thousand, nine hundred ninety-four".