21038199 has 48 divisors (see below), whose sum is σ = 35814240. Its totient is φ = 10886400.

The previous prime is 21038183. The next prime is 21038203. The reversal of 21038199 is 99183012.

It is not a de Polignac number, because 21038199 - 2⁴ = 21038183 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21038179) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 192957 + ... + 193065.

It is an arithmetic number, because the mean of its divisors is an integer number (746130).

Almost surely, 2^21038199 is an apocalyptic number.

21038199 is a deficient number, since it is larger than the sum of its proper divisors (14776041).

21038199 is a wasteful number, since it uses less digits than its factorization.

21038199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 21038199 is about 4586.7416539413. The cubic root of 21038199 is about 276.0595990806.

The spelling of 21038199 in words is "twenty-one million, thirty-eight thousand, one hundred ninety-nine".