20117047767 has 16 divisors (see below), whose sum is σ = 28936401120. Its totient is φ = 12384300032.

The previous prime is 20117047763. The next prime is 20117047861. The reversal of 20117047767 is 76774071102.

It is a cyclic number.

It is not a de Polignac number, because 20117047767 - 2² = 20117047763 is a prime.

It is a super-2 number, since 2×20117047767² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117047763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3718542 + ... + 3723947.

It is an arithmetic number, because the mean of its divisors is an integer number (1808525070).

Almost surely, 2^20117047767 is an apocalyptic number.

20117047767 is a deficient number, since it is larger than the sum of its proper divisors (8819353353).

20117047767 is a wasteful number, since it uses less digits than its factorization.

20117047767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7442562.

The product of its (nonzero) digits is 115248, while the sum is 42.

The spelling of 20117047767 in words is "twenty billion, one hundred seventeen million, forty-seven thousand, seven hundred sixty-seven".