20815274642068 has 24 divisors (see below), whose sum is σ = 36501285008160. Its totient is φ = 10386346053600.

The previous prime is 20815274642053. The next prime is 20815274642069. The reversal of 20815274642068 is 86024647251802.

It is a happy number.

It is a super-3 number, since 3×20815274642068³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20815274642069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7106643 + ... + 9598693.

It is an arithmetic number, because the mean of its divisors is an integer number (1520886875340).

Almost surely, 2^{20815274642068} is an apocalyptic number.

It is an amenable number.

20815274642068 is a deficient number, since it is larger than the sum of its proper divisors (15686010366092).

20815274642068 is a wasteful number, since it uses less digits than its factorization.

20815274642068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496327 (or 2496325 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 55.

The spelling of 20815274642068 in words is "twenty trillion, eight hundred fifteen billion, two hundred seventy-four million, six hundred forty-two thousand, sixty-eight".