20802666783575 has 12 divisors (see below), whose sum is σ = 25795516392000. Its totient is φ = 16641998213760.

The previous prime is 20802666783559. The next prime is 20802666783599. The reversal of 20802666783575 is 57538766620802.

It is not a de Polignac number, because 20802666783575 - 2⁴ = 20802666783559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182450 + ... + 6452799.

It is an arithmetic number, because the mean of its divisors is an integer number (2149626366000).

Almost surely, 2^{20802666783575} is an apocalyptic number.

20802666783575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20802666783575 is a deficient number, since it is larger than the sum of its proper divisors (4992849608425).

20802666783575 is a wasteful number, since it uses less digits than its factorization.

20802666783575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6760666 (or 6760661 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 65.

The spelling of 20802666783575 in words is "twenty trillion, eight hundred two billion, six hundred sixty-six million, seven hundred eighty-three thousand, five hundred seventy-five".