20625269 has 4 divisors (see below), whose sum is σ = 23571744. Its totient is φ = 17678796.

The previous prime is 20625263. The next prime is 20625271. The reversal of 20625269 is 96252602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20625269 - 2¹⁶ = 20559733 is a prime.

It is a super-2 number, since 2×20625269² = 850803442644722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1473227 + ... + 1473240.

It is an arithmetic number, because the mean of its divisors is an integer number (5892936).

Almost surely, 2^20625269 is an apocalyptic number.

It is an amenable number.

20625269 is a deficient number, since it is larger than the sum of its proper divisors (2946475).

20625269 is an equidigital number, since it uses as much as digits as its factorization.

20625269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946474.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20625269 is about 4541.5051469750. The cubic root of 20625269 is about 274.2415198693.

The spelling of 20625269 in words is "twenty million, six hundred twenty-five thousand, two hundred sixty-nine".