20117877 has 8 divisors (see below), whose sum is σ = 28887264. Its totient is φ = 12380208.

The previous prime is 20117869. The next prime is 20117891. The reversal of 20117877 is 77871102.

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

It is not a de Polignac number, because 20117877 - 2³ = 20117869 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 257883 + ... + 257960.

It is an arithmetic number, because the mean of its divisors is an integer number (3610908).

Almost surely, 2^20117877 is an apocalyptic number.

It is an amenable number.

20117877 is a deficient number, since it is larger than the sum of its proper divisors (8769387).

20117877 is a wasteful number, since it uses less digits than its factorization.

20117877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515859.

The product of its (nonzero) digits is 5488, while the sum is 33.

The square root of 20117877 is about 4485.2956424298. The cubic root of 20117877 is about 271.9739963967.

Adding to 20117877 its reverse (77871102), we get a palindrome (97988979).

The spelling of 20117877 in words is "twenty million, one hundred seventeen thousand, eight hundred seventy-seven".