20447938 has 8 divisors (see below), whose sum is σ = 35053632. Its totient is φ = 8763396.

The previous prime is 20447899. The next prime is 20447951. The reversal of 20447938 is 83974402.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20447897 and 20447906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730270 + ... + 730297.

It is an arithmetic number, because the mean of its divisors is an integer number (4381704).

Almost surely, 2^20447938 is an apocalyptic number.

20447938 is a deficient number, since it is larger than the sum of its proper divisors (14605694).

20447938 is a wasteful number, since it uses less digits than its factorization.

20447938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460576.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 20447938 is about 4521.9396280800. The cubic root of 20447938 is about 273.4533028124.

The spelling of 20447938 in words is "twenty million, four hundred forty-seven thousand, nine hundred thirty-eight".