21301198 has 4 divisors (see below), whose sum is σ = 31951800. Its totient is φ = 10650598.

The previous prime is 21301193. The next prime is 21301201. The reversal of 21301198 is 89110312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325298 + ... + 5325301.

It is an arithmetic number, because the mean of its divisors is an integer number (7987950).

Almost surely, 2^21301198 is an apocalyptic number.

21301198 is a deficient number, since it is larger than the sum of its proper divisors (10650602).

21301198 is a wasteful number, since it uses less digits than its factorization.

21301198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650601.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 21301198 is about 4615.3220906021. The cubic root of 21301198 is about 277.2051810349.

The spelling of 21301198 in words is "twenty-one million, three hundred one thousand, one hundred ninety-eight".