20946218497782 has 16 divisors (see below), whose sum is σ = 42363138535920. Its totient is φ = 6903622575872.

The previous prime is 20946218497769. The next prime is 20946218497829. The reversal of 20946218497782 is 28779481264902.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19612563603 + ... + 19612564670.

It is an arithmetic number, because the mean of its divisors is an integer number (2647696158495).

Almost surely, 2^{20946218497782} is an apocalyptic number.

20946218497782 is an abundant number, since it is smaller than the sum of its proper divisors (21416920038138).

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

20946218497782 is a wasteful number, since it uses less digits than its factorization.

20946218497782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39225128367.

The product of its (nonzero) digits is 195084288, while the sum is 69.

The spelling of 20946218497782 in words is "twenty trillion, nine hundred forty-six billion, two hundred eighteen million, four hundred ninety-seven thousand, seven hundred eighty-two".