20753393 has 2 divisors, whose sum is σ = 20753394. Its totient is φ = 20753392.

The previous prime is 20753333. The next prime is 20753401. The reversal of 20753393 is 39335702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20539024 + 214369 = 4532^2 + 463^2 .

It is a cyclic number.

It is not a de Polignac number, because 20753393 - 2⁶ = 20753329 is a prime.

It is not a weakly prime, because it can be changed into another prime (20753303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10376696 + 10376697.

It is an arithmetic number, because the mean of its divisors is an integer number (10376697).

Almost surely, 2^20753393 is an apocalyptic number.

It is an amenable number.

20753393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20753393 is an equidigital number, since it uses as much as digits as its factorization.

20753393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 32.

The square root of 20753393 is about 4555.5892044828. The cubic root of 20753393 is about 274.8082100750.

The spelling of 20753393 in words is "twenty million, seven hundred fifty-three thousand, three hundred ninety-three".