20507898 has 16 divisors (see below), whose sum is σ = 41094720. Its totient is φ = 6822816.

The previous prime is 20507891. The next prime is 20507909. The reversal of 20507898 is 89870502.

It is not an unprimeable number, because it can be changed into a prime (20507891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411 + ... + 6417.

It is an arithmetic number, because the mean of its divisors is an integer number (2568420).

Almost surely, 2^20507898 is an apocalyptic number.

20507898 is an abundant number, since it is smaller than the sum of its proper divisors (20586822).

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

20507898 is a wasteful number, since it uses less digits than its factorization.

20507898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6581.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 20507898 is about 4528.5646732712. The cubic root of 20507898 is about 273.7203266350.

The spelling of 20507898 in words is "twenty million, five hundred seven thousand, eight hundred ninety-eight".