20057459 has 2 divisors, whose sum is σ = 20057460. Its totient is φ = 20057458.

The previous prime is 20057437. The next prime is 20057461. The reversal of 20057459 is 95475002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20057459 is a prime.

Together with 20057461, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20057659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10028729 + 10028730.

It is an arithmetic number, because the mean of its divisors is an integer number (10028730).

Almost surely, 2^20057459 is an apocalyptic number.

20057459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20057459 is an equidigital number, since it uses as much as digits as its factorization.

20057459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 20057459 is about 4478.5554590738. Note that the first 3 decimals coincide. The cubic root of 20057459 is about 271.7014593216.

The spelling of 20057459 in words is "twenty million, fifty-seven thousand, four hundred fifty-nine".