20188274 has 4 divisors (see below), whose sum is σ = 30282414. Its totient is φ = 10094136.

The previous prime is 20188261. The next prime is 20188291. The reversal of 20188274 is 47288102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47288102 = 2 ⋅23644051.

It can be written as a sum of positive squares in only one way, i.e., 20187049 + 1225 = 4493^2 + 35^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20188274.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5047067 + ... + 5047070.

Almost surely, 2^20188274 is an apocalyptic number.

20188274 is a deficient number, since it is larger than the sum of its proper divisors (10094140).

20188274 is a wasteful number, since it uses less digits than its factorization.

20188274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10094139.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 20188274 is about 4493.1363211013. The cubic root of 20188274 is about 272.2908599256.

The spelling of 20188274 in words is "twenty million, one hundred eighty-eight thousand, two hundred seventy-four".