20047659 has 8 divisors (see below), whose sum is σ = 26751552. Its totient is φ = 13354440.

The previous prime is 20047649. The next prime is 20047663. The reversal of 20047659 is 95674002.

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

It is a de Polignac number, because none of the positive numbers 2^k-20047659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20047609) 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, 4372 + ... + 7694.

It is an arithmetic number, because the mean of its divisors is an integer number (3343944).

Almost surely, 2^20047659 is an apocalyptic number.

20047659 is a deficient number, since it is larger than the sum of its proper divisors (6703893).

20047659 is a wasteful number, since it uses less digits than its factorization.

20047659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5337.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20047659 is about 4477.4612226127. The cubic root of 20047659 is about 271.6572013380.

It can be divided in two parts, 20047 and 659, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 20047659 in words is "twenty million, forty-seven thousand, six hundred fifty-nine".