20252198 has 4 divisors (see below), whose sum is σ = 30378300. Its totient is φ = 10126098.

The previous prime is 20252189. The next prime is 20252231. The reversal of 20252198 is 89125202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89125202 = 2 ⋅44562601.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20252198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5063048 + ... + 5063051.

It is an arithmetic number, because the mean of its divisors is an integer number (7594575).

Almost surely, 2^20252198 is an apocalyptic number.

20252198 is a deficient number, since it is larger than the sum of its proper divisors (10126102).

20252198 is a wasteful number, since it uses less digits than its factorization.

20252198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10126101.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20252198 is about 4500.2442155954. The cubic root of 20252198 is about 272.5779503731.

The spelling of 20252198 in words is "twenty million, two hundred fifty-two thousand, one hundred ninety-eight".