20533781802806 has 8 divisors (see below), whose sum is σ = 30801066945264. Its totient is φ = 10266759487720.

The previous prime is 20533781802767. The next prime is 20533781802829. The reversal of 20533781802806 is 60820818733502.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65511410 + ... + 65824101.

It is an arithmetic number, because the mean of its divisors is an integer number (3850133368158).

Almost surely, 2^{20533781802806} is an apocalyptic number.

20533781802806 is a deficient number, since it is larger than the sum of its proper divisors (10267285142458).

20533781802806 is a wasteful number, since it uses less digits than its factorization.

20533781802806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131413686.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 20533781802806 in words is "twenty trillion, five hundred thirty-three billion, seven hundred eighty-one million, eight hundred two thousand, eight hundred six".