20069617 has 8 divisors (see below), whose sum is σ = 21070080. Its totient is φ = 19091280.

The previous prime is 20069597. The next prime is 20069627. The reversal of 20069617 is 71696002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20069617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (20069627) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3658 + ... + 7315.

It is an arithmetic number, because the mean of its divisors is an integer number (2633760).

Almost surely, 2^20069617 is an apocalyptic number.

20069617 is the 3658-th pentagonal number.

It is an amenable number.

20069617 is a deficient number, since it is larger than the sum of its proper divisors (1000463).

20069617 is a wasteful number, since it uses less digits than its factorization.

20069617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11063.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 20069617 is about 4479.9126107548. The cubic root of 20069617 is about 271.7563462861.

The spelling of 20069617 in words is "twenty million, sixty-nine thousand, six hundred seventeen".