20995198 has 32 divisors (see below), whose sum is σ = 37416960. Its totient is φ = 8648640.

The previous prime is 20995193. The next prime is 20995199. The reversal of 20995198 is 89159902.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20995193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45115 + ... + 45577.

It is an arithmetic number, because the mean of its divisors is an integer number (1169280).

Almost surely, 2^20995198 is an apocalyptic number.

20995198 is a deficient number, since it is larger than the sum of its proper divisors (16421762).

20995198 is a wasteful number, since it uses less digits than its factorization.

20995198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 20995198 is about 4582.0517238460. The cubic root of 20995198 is about 275.8713869019.

The spelling of 20995198 in words is "twenty million, nine hundred ninety-five thousand, one hundred ninety-eight".