20597474 has 4 divisors (see below), whose sum is σ = 30896214. Its totient is φ = 10298736.

The previous prime is 20597471. The next prime is 20597491. The reversal of 20597474 is 47479502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19140625 + 1456849 = 4375^2 + 1207^2 .

It is not an unprimeable number, because it can be changed into a prime (20597471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5149367 + ... + 5149370.

Almost surely, 2^20597474 is an apocalyptic number.

20597474 is a deficient number, since it is larger than the sum of its proper divisors (10298740).

20597474 is a wasteful number, since it uses less digits than its factorization.

20597474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10298739.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 20597474 is about 4538.4440064850. Note that the first 3 decimals coincide. The cubic root of 20597474 is about 274.1182734816.

It can be divided in two parts, 205 and 97474, that added together give a palindrome (97679).

The spelling of 20597474 in words is "twenty million, five hundred ninety-seven thousand, four hundred seventy-four".