20195498 has 4 divisors (see below), whose sum is σ = 30293250. Its totient is φ = 10097748.

The previous prime is 20195489. The next prime is 20195503. The reversal of 20195498 is 89459102.

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., 17247409 + 2948089 = 4153^2 + 1717^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5048873 + ... + 5048876.

Almost surely, 2^20195498 is an apocalyptic number.

20195498 is a deficient number, since it is larger than the sum of its proper divisors (10097752).

20195498 is a wasteful number, since it uses less digits than its factorization.

20195498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10097751.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 20195498 is about 4493.9401420135. The cubic root of 20195498 is about 272.3233341331.

The spelling of 20195498 in words is "twenty million, one hundred ninety-five thousand, four hundred ninety-eight".