21862198 has 16 divisors (see below), whose sum is σ = 34776000. Its totient is φ = 10278792.

The previous prime is 21862193. The next prime is 21862199. The reversal of 21862198 is 89126812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21862193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3213 + ... + 7351.

It is an arithmetic number, because the mean of its divisors is an integer number (2173500).

Almost surely, 2^21862198 is an apocalyptic number.

21862198 is a deficient number, since it is larger than the sum of its proper divisors (12913802).

21862198 is a wasteful number, since it uses less digits than its factorization.

21862198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299.

The product of its digits is 13824, while the sum is 37.

The square root of 21862198 is about 4675.7029418046. The cubic root of 21862198 is about 279.6176669468.

The spelling of 21862198 in words is "twenty-one million, eight hundred sixty-two thousand, one hundred ninety-eight".