20490798 has 16 divisors (see below), whose sum is σ = 41132880. Its totient is φ = 6805056.

The previous prime is 20490787. The next prime is 20490803. The reversal of 20490798 is 89709402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4503 + ... + 7826.

It is an arithmetic number, because the mean of its divisors is an integer number (2570805).

Almost surely, 2^20490798 is an apocalyptic number.

20490798 is an abundant number, since it is smaller than the sum of its proper divisors (20642082).

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

20490798 is a wasteful number, since it uses less digits than its factorization.

20490798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12611.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 20490798 is about 4526.6762641037. The cubic root of 20490798 is about 273.6442271874.

The spelling of 20490798 in words is "twenty million, four hundred ninety thousand, seven hundred ninety-eight".