20455898 has 8 divisors (see below), whose sum is σ = 30712608. Its totient is φ = 10218364.

The previous prime is 20455891. The next prime is 20455907. The reversal of 20455898 is 89855402.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20455891) 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, 1736 + ... + 6627.

It is an arithmetic number, because the mean of its divisors is an integer number (3839076).

Almost surely, 2^20455898 is an apocalyptic number.

20455898 is a deficient number, since it is larger than the sum of its proper divisors (10256710).

20455898 is a wasteful number, since it uses less digits than its factorization.

20455898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9588.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 20455898 is about 4522.8196957208. The cubic root of 20455898 is about 273.4887816286.

The spelling of 20455898 in words is "twenty million, four hundred fifty-five thousand, eight hundred ninety-eight".