20364457 has 2 divisors, whose sum is σ = 20364458. Its totient is φ = 20364456.

The previous prime is 20364451. The next prime is 20364479. The reversal of 20364457 is 75446302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15594601 + 4769856 = 3949^2 + 2184^2 .

It is a cyclic number.

It is not a de Polignac number, because 20364457 - 2⁷ = 20364329 is a prime.

It is a super-2 number, since 2×20364457² = 829422217809698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20364451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10182228 + 10182229.

It is an arithmetic number, because the mean of its divisors is an integer number (10182229).

Almost surely, 2^20364457 is an apocalyptic number.

It is an amenable number.

20364457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20364457 is an equidigital number, since it uses as much as digits as its factorization.

20364457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 20364457 is about 4512.6995246748. The cubic root of 20364457 is about 273.0806606419.

The spelling of 20364457 in words is "twenty million, three hundred sixty-four thousand, four hundred fifty-seven".