20047898 has 8 divisors (see below), whose sum is σ = 32385108. Its totient is φ = 9252864.

The previous prime is 20047891. The next prime is 20047901. The reversal of 20047898 is 89874002.

It can be written as a sum of positive squares in 2 ways, for example, as 17497489 + 2550409 = 4183^2 + 1597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20047891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385511 + ... + 385562.

Almost surely, 2^20047898 is an apocalyptic number.

20047898 is a deficient number, since it is larger than the sum of its proper divisors (12337210).

20047898 is a wasteful number, since it uses less digits than its factorization.

20047898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771088.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 20047898 is about 4477.4879117648. The cubic root of 20047898 is about 271.6582808624.

The spelling of 20047898 in words is "twenty million, forty-seven thousand, eight hundred ninety-eight".