20455398 has 12 divisors (see below), whose sum is σ = 44320068. Its totient is φ = 6818460.

The previous prime is 20455397. The next prime is 20455417. The reversal of 20455398 is 89355402.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455397) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568188 + ... + 568223.

It is an arithmetic number, because the mean of its divisors is an integer number (3693339).

Almost surely, 2^20455398 is an apocalyptic number.

20455398 is an abundant number, since it is smaller than the sum of its proper divisors (23864670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20455398 is a wasteful number, since it uses less digits than its factorization.

20455398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136419 (or 1136416 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 20455398 is about 4522.7644201307. The cubic root of 20455398 is about 273.4865533307.

The spelling of 20455398 in words is "twenty million, four hundred fifty-five thousand, three hundred ninety-eight".