20464057 has 2 divisors, whose sum is σ = 20464058. Its totient is φ = 20464056.

The previous prime is 20464027. The next prime is 20464063. The reversal of 20464057 is 75046402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14017536 + 6446521 = 3744^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 20464057 - 2¹⁹ = 19939769 is a prime.

It is not a weakly prime, because it can be changed into another prime (20464027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10232028 + 10232029.

It is an arithmetic number, because the mean of its divisors is an integer number (10232029).

Almost surely, 2^20464057 is an apocalyptic number.

It is an amenable number.

20464057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20464057 is an equidigital number, since it uses as much as digits as its factorization.

20464057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20464057 is about 4523.7215873659. The cubic root of 20464057 is about 273.5251378646.

It can be divided in two parts, 204 and 64057, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 20464057 in words is "twenty million, four hundred sixty-four thousand, fifty-seven".