20537404 has 12 divisors (see below), whose sum is σ = 37832200. Its totient is φ = 9728208.

The previous prime is 20537401. The next prime is 20537431. The reversal of 20537404 is 40473502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20537401) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 135039 + ... + 135190.

Almost surely, 2^20537404 is an apocalyptic number.

It is an amenable number.

20537404 is a deficient number, since it is larger than the sum of its proper divisors (17294796).

20537404 is a wasteful number, since it uses less digits than its factorization.

20537404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270252 (or 270250 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20537404 is about 4531.8212674376. The cubic root of 20537404 is about 273.8515365996.

The spelling of 20537404 in words is "twenty million, five hundred thirty-seven thousand, four hundred four".