20290750 has 16 divisors (see below), whose sum is σ = 37984752. Its totient is φ = 8116200.

The previous prime is 20290747. The next prime is 20290769. The reversal of 20290750 is 5709202.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 40332 + ... + 40831.

It is an arithmetic number, because the mean of its divisors is an integer number (2374047).

Almost surely, 2^20290750 is an apocalyptic number.

20290750 is a deficient number, since it is larger than the sum of its proper divisors (17694002).

20290750 is an equidigital number, since it uses as much as digits as its factorization.

20290750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81180 (or 81170 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 20290750 is about 4504.5255022033. The cubic root of 20290750 is about 272.7508001588.

Adding to 20290750 its reverse (5709202), we get a palindrome (25999952).

The spelling of 20290750 in words is "twenty million, two hundred ninety thousand, seven hundred fifty".