20625869 has 16 divisors (see below), whose sum is σ = 23302080. Its totient is φ = 18096000.

The previous prime is 20625841. The next prime is 20625877. The reversal of 20625869 is 96852602.

It is a cyclic number.

It is not a de Polignac number, because 20625869 - 2²⁴ = 3848653 is a prime.

It is a super-2 number, since 2×20625869² = 850852944010322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625569) 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, 39329 + ... + 39849.

It is an arithmetic number, because the mean of its divisors is an integer number (1456380).

Almost surely, 2^20625869 is an apocalyptic number.

It is an amenable number.

20625869 is a deficient number, since it is larger than the sum of its proper divisors (2676211).

20625869 is a wasteful number, since it uses less digits than its factorization.

20625869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 20625869 is about 4541.5712038897. The cubic root of 20625869 is about 274.2441791206.

The spelling of 20625869 in words is "twenty million, six hundred twenty-five thousand, eight hundred sixty-nine".