20291053 has 2 divisors, whose sum is σ = 20291054. Its totient is φ = 20291052.

The previous prime is 20290999. The next prime is 20291057. The reversal of 20291053 is 35019202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 59049 = 4498^2 + 243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20291053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20291057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10145526 + 10145527.

It is an arithmetic number, because the mean of its divisors is an integer number (10145527).

Almost surely, 2^20291053 is an apocalyptic number.

It is an amenable number.

20291053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20291053 is an equidigital number, since it uses as much as digits as its factorization.

20291053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20291053 is about 4504.5591349210. The cubic root of 20291053 is about 272.7521578067.

The spelling of 20291053 in words is "twenty million, two hundred ninety-one thousand, fifty-three".