20625722 has 8 divisors (see below), whose sum is σ = 33318516. Its totient is φ = 9519552.

The previous prime is 20625721. The next prime is 20625727. The reversal of 20625722 is 22752602.

It can be written as a sum of positive squares in 2 ways, for example, as 20620681 + 5041 = 4541^2 + 71^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 793297 = 20625722 / (2 + 0 + 6 + 2 + 5 + 7 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20625691 and 20625700.

It is not an unprimeable number, because it can be changed into a prime (20625721) 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, 396623 + ... + 396674.

Almost surely, 2^20625722 is an apocalyptic number.

20625722 is a deficient number, since it is larger than the sum of its proper divisors (12692794).

20625722 is a wasteful number, since it uses less digits than its factorization.

20625722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793312.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20625722 is about 4541.5550200344. Note that the first 3 decimals coincide. The cubic root of 20625722 is about 274.2435276088.

The spelling of 20625722 in words is "twenty million, six hundred twenty-five thousand, seven hundred twenty-two".