20149717293 has 6 divisors (see below), whose sum is σ = 29105147214. Its totient is φ = 13433144856.

The previous prime is 20149717277. The next prime is 20149717297. The reversal of 20149717293 is 39271794102.

20149717293 is a `hidden beast` number, since 2 + 0 + 1 + 497 + 1 + 72 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15272510724 + 4877206569 = 123582^2 + 69837^2 .

It is not a de Polignac number, because 20149717293 - 2⁴ = 20149717277 is a prime.

It is a super-2 number, since 2×20149717293² (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 (20149717297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1119428730 + ... + 1119428747.

It is an arithmetic number, because the mean of its divisors is an integer number (4850857869).

Almost surely, 2^20149717293 is an apocalyptic number.

It is an amenable number.

20149717293 is a deficient number, since it is larger than the sum of its proper divisors (8955429921).

20149717293 is a wasteful number, since it uses less digits than its factorization.

20149717293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238857483 (or 2238857480 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 20149717293 in words is "twenty billion, one hundred forty-nine million, seven hundred seventeen thousand, two hundred ninety-three".