20263253 has 16 divisors (see below), whose sum is σ = 22550400. Its totient is φ = 18120960.

The previous prime is 20263249. The next prime is 20263261. The reversal of 20263253 is 35236202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20263253 - 2² = 20263249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263283) 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, 38633 + ... + 39153.

It is an arithmetic number, because the mean of its divisors is an integer number (1409400).

Almost surely, 2^20263253 is an apocalyptic number.

20263253 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20263253 is a deficient number, since it is larger than the sum of its proper divisors (2287147).

20263253 is a wasteful number, since it uses less digits than its factorization.

20263253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20263253 is about 4501.4723146988. The cubic root of 20263253 is about 272.6275384246.

Adding to 20263253 its reverse (35236202), we get a palindrome (55499455).

The spelling of 20263253 in words is "twenty million, two hundred sixty-three thousand, two hundred fifty-three".