20473732 has 6 divisors (see below), whose sum is σ = 35829038. Its totient is φ = 10236864.

The previous prime is 20473723. The next prime is 20473751. The reversal of 20473732 is 23737402.

It can be written as a sum of positive squares in only one way, i.e., 19855936 + 617796 = 4456^2 + 786^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20473732.

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 as a sum of consecutive naturals, namely, 2559213 + ... + 2559220.

Almost surely, 2^20473732 is an apocalyptic number.

It is an amenable number.

20473732 is a deficient number, since it is larger than the sum of its proper divisors (15355306).

20473732 is a wasteful number, since it uses less digits than its factorization.

20473732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118437 (or 5118435 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 28.

The square root of 20473732 is about 4524.7908238945. The cubic root of 20473732 is about 273.5682368254.

The spelling of 20473732 in words is "twenty million, four hundred seventy-three thousand, seven hundred thirty-two".