20440933 has 2 divisors, whose sum is σ = 20440934. Its totient is φ = 20440932.

The previous prime is 20440921. The next prime is 20440943. The reversal of 20440933 is 33904402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15233409 + 5207524 = 3903^2 + 2282^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440933 - 2⁹ = 20440421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20440898 and 20440907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220466 + 10220467.

It is an arithmetic number, because the mean of its divisors is an integer number (10220467).

Almost surely, 2^20440933 is an apocalyptic number.

It is an amenable number.

20440933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440933 is an equidigital number, since it uses as much as digits as its factorization.

20440933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 20440933 is about 4521.1650047305. The cubic root of 20440933 is about 273.4220729451.

The spelling of 20440933 in words is "twenty million, four hundred forty thousand, nine hundred thirty-three".