20625433 has 6 divisors (see below), whose sum is σ = 21075866. Its totient is φ = 20184432.

The previous prime is 20625421. The next prime is 20625439. The reversal of 20625433 is 33452602.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20358144 + 267289 = 4512^2 + 517^2 .

It is not a de Polignac number, because 20625433 - 2¹⁷ = 20494361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20625398 and 20625407.

It is not an unprimeable number, because it can be changed into a prime (20625439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2460 + ... + 6877.

Almost surely, 2^20625433 is an apocalyptic number.

It is an amenable number.

20625433 is a deficient number, since it is larger than the sum of its proper divisors (450433).

20625433 is an frugal number, since it uses more digits than its factorization.

20625433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431 (or 9384 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20625433 is about 4541.5232026271. The cubic root of 20625433 is about 274.2422467365.

The spelling of 20625433 in words is "twenty million, six hundred twenty-five thousand, four hundred thirty-three".