20573433 has 10 divisors (see below), whose sum is σ = 30733274. Its totient is φ = 13715568.

The previous prime is 20573411. The next prime is 20573453. The reversal of 20573433 is 33437502.

It can be written as a sum of positive squares in only one way, i.e., 17740944 + 2832489 = 4212^2 + 1683^2 .

It is not a de Polignac number, because 20573433 - 2⁵ = 20573401 is a prime.

It is a super-2 number, since 2×20573433² = 846532290810978, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20573397 and 20573406.

It is not an unprimeable number, because it can be changed into a prime (20573453) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 126916 + ... + 127077.

Almost surely, 2^20573433 is an apocalyptic number.

It is an amenable number.

20573433 is a deficient number, since it is larger than the sum of its proper divisors (10159841).

20573433 is an equidigital number, since it uses as much as digits as its factorization.

20573433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254005 (or 253996 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 27.

The square root of 20573433 is about 4535.7946382084. The cubic root of 20573433 is about 274.0115833276.

The spelling of 20573433 in words is "twenty million, five hundred seventy-three thousand, four hundred thirty-three".