20252790 has 48 divisors (see below), whose sum is σ = 52900848. Its totient is φ = 5375808.

The previous prime is 20252783. The next prime is 20252807. The reversal of 20252790 is 9725202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27264 + ... + 27996.

It is an arithmetic number, because the mean of its divisors is an integer number (1102101).

Almost surely, 2^20252790 is an apocalyptic number.

20252790 is an abundant number, since it is smaller than the sum of its proper divisors (32648058).

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

20252790 is a wasteful number, since it uses less digits than its factorization.

20252790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20252790 is about 4500.3099893230. The cubic root of 20252790 is about 272.5806062918.

Adding to 20252790 its reverse (9725202), we get a palindrome (29977992).

The spelling of 20252790 in words is "twenty million, two hundred fifty-two thousand, seven hundred ninety".