20498790 has 32 divisors (see below), whose sum is σ = 52982496. Its totient is φ = 5045760.

The previous prime is 20498789. The next prime is 20498801. The reversal of 20498790 is 9789402.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25891 + ... + 26670.

It is an arithmetic number, because the mean of its divisors is an integer number (1655703).

Almost surely, 2^20498790 is an apocalyptic number.

20498790 is an abundant number, since it is smaller than the sum of its proper divisors (32483706).

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

20498790 is a wasteful number, since it uses less digits than its factorization.

20498790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52584.

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

The square root of 20498790 is about 4527.5589449504. The cubic root of 20498790 is about 273.6797989336.

The spelling of 20498790 in words is "twenty million, four hundred ninety-eight thousand, seven hundred ninety".