20117079 has 20 divisors (see below), whose sum is σ = 30361320. Its totient is φ = 13273200.

The previous prime is 20117059. The next prime is 20117089. The reversal of 20117079 is 97071102.

It is not a de Polignac number, because 20117079 - 2¹¹ = 20115031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117059) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6952 + ... + 9410.

It is an arithmetic number, because the mean of its divisors is an integer number (1518066).

Almost surely, 2^20117079 is an apocalyptic number.

20117079 is a deficient number, since it is larger than the sum of its proper divisors (10244241).

20117079 is a wasteful number, since it uses less digits than its factorization.

20117079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572 (or 2563 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 20117079 is about 4485.2066842009. The cubic root of 20117079 is about 271.9704002897.

The spelling of 20117079 in words is "twenty million, one hundred seventeen thousand, seventy-nine".