20924074 has 4 divisors (see below), whose sum is σ = 31386114. Its totient is φ = 10462036.

The previous prime is 20924047. The next prime is 20924077. The reversal of 20924074 is 47042902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47042902 = 2 ⋅23521451.

It can be written as a sum of positive squares in only one way, i.e., 19298449 + 1625625 = 4393^2 + 1275^2 .

It is not an unprimeable number, because it can be changed into a prime (20924077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5231017 + ... + 5231020.

Almost surely, 2^20924074 is an apocalyptic number.

20924074 is a deficient number, since it is larger than the sum of its proper divisors (10462040).

20924074 is a wasteful number, since it uses less digits than its factorization.

20924074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10462039.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20924074 is about 4574.2839876859. The cubic root of 20924074 is about 275.5595175775.

Adding to 20924074 its reverse (47042902), we get a palindrome (67966976).

The spelling of 20924074 in words is "twenty million, nine hundred twenty-four thousand, seventy-four".