20430874 has 24 divisors (see below), whose sum is σ = 32254560. Its totient is φ = 9702240.

The previous prime is 20430857. The next prime is 20430899. The reversal of 20430874 is 47803402.

It is a super-2 number, since 2×20430874² = 834841224807752, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198307 + ... + 198409.

It is an arithmetic number, because the mean of its divisors is an integer number (1343940).

Almost surely, 2^20430874 is an apocalyptic number.

20430874 is a deficient number, since it is larger than the sum of its proper divisors (11823686).

20430874 is a wasteful number, since it uses less digits than its factorization.

20430874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20430874 is about 4520.0524333242. The cubic root of 20430874 is about 273.3772151769.

The spelling of 20430874 in words is "twenty million, four hundred thirty thousand, eight hundred seventy-four".