20399053 has 2 divisors, whose sum is σ = 20399054. Its totient is φ = 20399052.

The previous prime is 20399039. The next prime is 20399059. The reversal of 20399053 is 35099302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15896169 + 4502884 = 3987^2 + 2122^2 .

It is a cyclic number.

It is not a de Polignac number, because 20399053 - 2¹³ = 20390861 is a prime.

It is a super-2 number, since 2×20399053² = 832242726593618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20399059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10199526 + 10199527.

It is an arithmetic number, because the mean of its divisors is an integer number (10199527).

Almost surely, 2^20399053 is an apocalyptic number.

It is an amenable number.

20399053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20399053 is an equidigital number, since it uses as much as digits as its factorization.

20399053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 20399053 is about 4516.5310803757. The cubic root of 20399053 is about 273.2352134762.

The spelling of 20399053 in words is "twenty million, three hundred ninety-nine thousand, fifty-three".