20440628933 has 2 divisors, whose sum is σ = 20440628934. Its totient is φ = 20440628932.

The previous prime is 20440628911. The next prime is 20440628969. The reversal of 20440628933 is 33982604402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20191557409 + 249071524 = 142097^2 + 15782^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440628933 - 2⁶ = 20440628869 is a prime.

It is a super-2 number, since 2×20440628933² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440628903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220314466 + 10220314467.

It is an arithmetic number, because the mean of its divisors is an integer number (10220314467).

Almost surely, 2^20440628933 is an apocalyptic number.

It is an amenable number.

20440628933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440628933 is an equidigital number, since it uses as much as digits as its factorization.

20440628933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 20440628933 in words is "twenty billion, four hundred forty million, six hundred twenty-eight thousand, nine hundred thirty-three".