20503732 has 6 divisors (see below), whose sum is σ = 35881538. Its totient is φ = 10251864.

The previous prime is 20503709. The next prime is 20503753. The reversal of 20503732 is 23730502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14714896 + 5788836 = 3836^2 + 2406^2 .

It is a congruent 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 as a sum of consecutive naturals, namely, 2562963 + ... + 2562970.

Almost surely, 2^20503732 is an apocalyptic number.

It is an amenable number.

20503732 is a deficient number, since it is larger than the sum of its proper divisors (15377806).

20503732 is a wasteful number, since it uses less digits than its factorization.

20503732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125937 (or 5125935 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 20503732 is about 4528.1046807688. The cubic root of 20503732 is about 273.7017907502.

The spelling of 20503732 in words is "twenty million, five hundred three thousand, seven hundred thirty-two".