20253245 has 16 divisors (see below), whose sum is σ = 25280640. Its totient is φ = 15562944.

The previous prime is 20253241. The next prime is 20253347. The reversal of 20253245 is 54235202.

It is a cyclic number.

It is not a de Polignac number, because 20253245 - 2² = 20253241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20253245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20253241) 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, 14696 + ... + 16014.

It is an arithmetic number, because the mean of its divisors is an integer number (1580040).

Almost surely, 2^20253245 is an apocalyptic number.

It is an amenable number.

20253245 is a deficient number, since it is larger than the sum of its proper divisors (5027395).

20253245 is a wasteful number, since it uses less digits than its factorization.

20253245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20253245 is about 4500.3605411122. The cubic root of 20253245 is about 272.5826475455.

Adding to 20253245 its reverse (54235202), we get a palindrome (74488447).

The spelling of 20253245 in words is "twenty million, two hundred fifty-three thousand, two hundred forty-five".