20198474 has 4 divisors (see below), whose sum is σ = 30297714. Its totient is φ = 10099236.

The previous prime is 20198449. The next prime is 20198489. The reversal of 20198474 is 47489102.

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

It can be written as a sum of positive squares in only one way, i.e., 16933225 + 3265249 = 4115^2 + 1807^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5049617 + ... + 5049620.

Almost surely, 2^20198474 is an apocalyptic number.

20198474 is a deficient number, since it is larger than the sum of its proper divisors (10099240).

20198474 is a wasteful number, since it uses less digits than its factorization.

20198474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10099239.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 20198474 is about 4494.2712423707. The cubic root of 20198474 is about 272.3367099597.

The spelling of 20198474 in words is "twenty million, one hundred ninety-eight thousand, four hundred seventy-four".