20250690 has 32 divisors (see below), whose sum is σ = 49109760. Its totient is φ = 5343744.

The previous prime is 20250677. The next prime is 20250697. The reversal of 20250690 is 9605202.

It is a super-2 number, since 2×20250690² = 820180890952200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20250690.

It is not an unprimeable number, because it can be changed into a prime (20250697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (1534680).

Almost surely, 2^20250690 is an apocalyptic number.

20250690 is an abundant number, since it is smaller than the sum of its proper divisors (28859070).

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

20250690 is a wasteful number, since it uses less digits than its factorization.

20250690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20250690 is about 4500.0766660136. The cubic root of 20250690 is about 272.5711847247.

Adding to 20250690 its reverse (9605202), we get a palindrome (29855892).

The spelling of 20250690 in words is "twenty million, two hundred fifty thousand, six hundred ninety".