20856099065802 has 64 divisors (see below), whose sum is σ = 56005189115904. Its totient is φ = 5000463311040.

The previous prime is 20856099065801. The next prime is 20856099065831.

20856099065802 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (20856099065801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1736265978 + ... + 1736277989.

It is an arithmetic number, because the mean of its divisors is an integer number (875081079936).

Almost surely, 2^{20856099065802} is an apocalyptic number.

20856099065802 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20856099065802 is an abundant number, since it is smaller than the sum of its proper divisors (35149090050102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20856099065802 is a wasteful number, since it uses less digits than its factorization.

20856099065802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472544003.

The product of its (nonzero) digits is 18662400, while the sum is 60.

The spelling of 20856099065802 in words is "twenty trillion, eight hundred fifty-six billion, ninety-nine million, sixty-five thousand, eight hundred two".