20115000297 has 64 divisors (see below), whose sum is σ = 34701350400. Its totient is φ = 11419709184.

The previous prime is 20115000293. The next prime is 20115000371. The reversal of 20115000297 is 79200051102.

It is not a de Polignac number, because 20115000297 - 2² = 20115000293 is a prime.

It is a super-2 number, since 2×20115000297² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20115000297.

It is not an unprimeable number, because it can be changed into a prime (20115000293) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2399329 + ... + 2407697.

It is an arithmetic number, because the mean of its divisors is an integer number (542208600).

Almost surely, 2^20115000297 is an apocalyptic number.

20115000297 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20115000297 is a deficient number, since it is larger than the sum of its proper divisors (14586350103).

20115000297 is an frugal number, since it uses more digits than its factorization.

20115000297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8554 (or 8536 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

Adding to 20115000297 its reverse (79200051102), we get a palindrome (99315051399).

The spelling of 20115000297 in words is "twenty billion, one hundred fifteen million, two hundred ninety-seven", and thus it is an aban number.