20117077 has 8 divisors (see below), whose sum is σ = 20645856. Its totient is φ = 19591152.

The previous prime is 20117059. The next prime is 20117089. The reversal of 20117077 is 77071102.

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-20117077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117777) 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, 24843 + ... + 25639.

It is an arithmetic number, because the mean of its divisors is an integer number (2580732).

Almost surely, 2^20117077 is an apocalyptic number.

It is an amenable number.

20117077 is a deficient number, since it is larger than the sum of its proper divisors (528779).

20117077 is an equidigital number, since it uses as much as digits as its factorization.

20117077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427.

The product of its (nonzero) digits is 686, while the sum is 25.

The square root of 20117077 is about 4485.2064612457. The cubic root of 20117077 is about 271.9703912768.

Adding to 20117077 its reverse (77071102), we get a palindrome (97188179).

The spelling of 20117077 in words is "twenty million, one hundred seventeen thousand, seventy-seven".