20057505 has 16 divisors (see below), whose sum is σ = 34560960. Its totient is φ = 9874368.

The previous prime is 20057503. The next prime is 20057507. The reversal of 20057505 is 50575002.

It is an interprime number because it is at equal distance from previous prime (20057503) and next prime (20057507).

It is not a de Polignac number, because 20057505 - 2¹ = 20057503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20057503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51235 + ... + 51624.

It is an arithmetic number, because the mean of its divisors is an integer number (2160060).

Almost surely, 2^20057505 is an apocalyptic number.

It is an amenable number.

20057505 is a deficient number, since it is larger than the sum of its proper divisors (14503455).

20057505 is a wasteful number, since it uses less digits than its factorization.

20057505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102880.

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 20057505 is about 4478.5605946554. The cubic root of 20057505 is about 271.7016670292.

The spelling of 20057505 in words is "twenty million, fifty-seven thousand, five hundred five".