20602840806813 has 8 divisors (see below), whose sum is σ = 27471450439168. Its totient is φ = 13734729189504.

The previous prime is 20602840806697. The next prime is 20602840806817. The reversal of 20602840806813 is 31860804820602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20602840806813 - 2¹² = 20602840802717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20602840806817) 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, 124407220 + ... + 124572717.

It is an arithmetic number, because the mean of its divisors is an integer number (3433931304896).

Almost surely, 2^{20602840806813} is an apocalyptic number.

It is an amenable number.

20602840806813 is a deficient number, since it is larger than the sum of its proper divisors (6868609632355).

20602840806813 is a wasteful number, since it uses less digits than its factorization.

20602840806813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249007523.

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 20602840806813 in words is "twenty trillion, six hundred two billion, eight hundred forty million, eight hundred six thousand, eight hundred thirteen".