20613250 has 32 divisors (see below), whose sum is σ = 44104320. Its totient is φ = 7066800.

The previous prime is 20613239. The next prime is 20613253. The reversal of 20613250 is 5231602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20613253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4140 + ... + 7639.

It is an arithmetic number, because the mean of its divisors is an integer number (1378260).

Almost surely, 2^20613250 is an apocalyptic number.

20613250 is an abundant number, since it is smaller than the sum of its proper divisors (23491070).

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

20613250 is a wasteful number, since it uses less digits than its factorization.

20613250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11803 (or 11793 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20613250 is about 4540.1817144251. The cubic root of 20613250 is about 274.1882397677.

Adding to 20613250 its reverse (5231602), we get a palindrome (25844852).

It can be divided in two parts, 206 and 13250, that added together give a square (13456 = 116²).

The spelling of 20613250 in words is "twenty million, six hundred thirteen thousand, two hundred fifty".