20047017 has 8 divisors (see below), whose sum is σ = 26877760. Its totient is φ = 13290480.

The previous prime is 20047009. The next prime is 20047019. The reversal of 20047017 is 71074002.

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

It is not a de Polignac number, because 20047017 - 2³ = 20047009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20046984 and 20047002.

It is not an unprimeable number, because it can be changed into a prime (20047019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17917 + ... + 19002.

It is an arithmetic number, because the mean of its divisors is an integer number (3359720).

Almost surely, 2^20047017 is an apocalyptic number.

It is an amenable number.

20047017 is a deficient number, since it is larger than the sum of its proper divisors (6830743).

20047017 is a wasteful number, since it uses less digits than its factorization.

20047017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37103.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20047017 is about 4477.3895296255. The cubic root of 20047017 is about 271.6543014851.

The spelling of 20047017 in words is "twenty million, forty-seven thousand, seventeen".