20538074 has 12 divisors (see below), whose sum is σ = 32726814. Its totient is φ = 9664704.

The previous prime is 20538043. The next prime is 20538109. The reversal of 20538074 is 47083502.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 17698849 + 2839225 = 4207^2 + 1685^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17189 + ... + 18344.

Almost surely, 2^20538074 is an apocalyptic number.

20538074 is a deficient number, since it is larger than the sum of its proper divisors (12188740).

20538074 is a wasteful number, since it uses less digits than its factorization.

20538074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35569 (or 35552 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20538074 is about 4531.8951885497. The cubic root of 20538074 is about 273.8545145569.

The spelling of 20538074 in words is "twenty million, five hundred thirty-eight thousand, seventy-four".