20473736 has 16 divisors (see below), whose sum is σ = 38503500. Its totient is φ = 10206144.

The previous prime is 20473723. The next prime is 20473751. The reversal of 20473736 is 63737402.

It can be written as a sum of positive squares in 2 ways, for example, as 19412836 + 1060900 = 4406^2 + 1030^2 .

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 3 ways as a sum of consecutive naturals, for example, 875 + ... + 6458.

Almost surely, 2^20473736 is an apocalyptic number.

It is an amenable number.

20473736 is a deficient number, since it is larger than the sum of its proper divisors (18029764).

20473736 is a wasteful number, since it uses less digits than its factorization.

20473736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7688 (or 7684 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 32.

The square root of 20473736 is about 4524.7912659039. The cubic root of 20473736 is about 273.5682546413.

The spelling of 20473736 in words is "twenty million, four hundred seventy-three thousand, seven hundred thirty-six".