20047738 has 8 divisors (see below), whose sum is σ = 30111732. Its totient is φ = 10010496.

The previous prime is 20047733. The next prime is 20047739. The reversal of 20047738 is 83774002.

It can be written as a sum of positive squares in 2 ways, for example, as 18896409 + 1151329 = 4347^2 + 1073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20047733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4695 + ... + 7882.

Almost surely, 2^20047738 is an apocalyptic number.

20047738 is a deficient number, since it is larger than the sum of its proper divisors (10063994).

20047738 is a wasteful number, since it uses less digits than its factorization.

20047738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13376.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 20047738 is about 4477.4700445676. The cubic root of 20047738 is about 271.6575581692.

The spelling of 20047738 in words is "twenty million, forty-seven thousand, seven hundred thirty-eight".