20402668246115 has 4 divisors (see below), whose sum is σ = 24483201895344. Its totient is φ = 16322134596888.

The previous prime is 20402668246099. The next prime is 20402668246157. The reversal of 20402668246115 is 51164286620402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20402668246115 - 2⁴ = 20402668246099 is a prime.

It is a super-2 number, since 2×20402668246115² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20402668246115.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040266824607 + ... + 2040266824616.

It is an arithmetic number, because the mean of its divisors is an integer number (6120800473836).

Almost surely, 2^{20402668246115} is an apocalyptic number.

20402668246115 is a deficient number, since it is larger than the sum of its proper divisors (4080533649229).

20402668246115 is an equidigital number, since it uses as much as digits as its factorization.

20402668246115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080533649228.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 20402668246115 in words is "twenty trillion, four hundred two billion, six hundred sixty-eight million, two hundred forty-six thousand, one hundred fifteen".