20117612249 has 16 divisors (see below), whose sum is σ = 23133067776. Its totient is φ = 17137656000.

The previous prime is 20117612233. The next prime is 20117612297. The reversal of 20117612249 is 94221671102.

It is a cyclic number.

It is not a de Polignac number, because 20117612249 - 2⁴ = 20117612233 is a prime.

It is a super-2 number, since 2×20117612249² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20117612219) 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, 2526224 + ... + 2534174.

It is an arithmetic number, because the mean of its divisors is an integer number (1445816736).

Almost surely, 2^20117612249 is an apocalyptic number.

It is an amenable number.

20117612249 is a deficient number, since it is larger than the sum of its proper divisors (3015455527).

20117612249 is a wasteful number, since it uses less digits than its factorization.

20117612249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10136.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 20117612249 in words is "twenty billion, one hundred seventeen million, six hundred twelve thousand, two hundred forty-nine".