20324457 has 6 divisors (see below), whose sum is σ = 29357562. Its totient is φ = 13549632.

The previous prime is 20324453. The next prime is 20324483. The reversal of 20324457 is 75442302.

20324457 is a `hidden beast` number, since 203 + 2 + 4 + 457 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19105641 + 1218816 = 4371^2 + 1104^2 .

It is not a de Polignac number, because 20324457 - 2² = 20324453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20324457.

It is not an unprimeable number, because it can be changed into a prime (20324453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1129128 + ... + 1129145.

It is an arithmetic number, because the mean of its divisors is an integer number (4892927).

Almost surely, 2^20324457 is an apocalyptic number.

It is an amenable number.

20324457 is a deficient number, since it is larger than the sum of its proper divisors (9033105).

20324457 is a wasteful number, since it uses less digits than its factorization.

20324457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258279 (or 2258276 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 20324457 is about 4508.2654092234. The cubic root of 20324457 is about 272.9017478420.

Adding to 20324457 its reverse (75442302), we get a palindrome (95766759).

The spelling of 20324457 in words is "twenty million, three hundred twenty-four thousand, four hundred fifty-seven".