20713250 has 32 divisors (see below), whose sum is σ = 40126320. Its totient is φ = 7996800.

The previous prime is 20713243. The next prime is 20713261. The reversal of 20713250 is 5231702.

It can be written as a sum of positive squares in 8 ways, for example, as 1590121 + 19123129 = 1261^2 + 4373^2 .

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 15 ways as a sum of consecutive naturals, for example, 5822 + ... + 8678.

Almost surely, 2^20713250 is an apocalyptic number.

20713250 is a deficient number, since it is larger than the sum of its proper divisors (19413070).

20713250 is a wasteful number, since it uses less digits than its factorization.

20713250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903 (or 2893 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20713250 is about 4551.1811653680. The cubic root of 20713250 is about 274.6309098073.

Adding to 20713250 its reverse (5231702), we get a palindrome (25944952).

The spelling of 20713250 in words is "twenty million, seven hundred thirteen thousand, two hundred fifty".