20331904934866 has 16 divisors (see below), whose sum is σ = 35109108003456. Its totient is φ = 8650070086176.

The previous prime is 20331904934863. The next prime is 20331904934917. The reversal of 20331904934866 is 66843940913302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20331904934866.

It is not an unprimeable number, because it can be changed into a prime (20331904934863) 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, 5300286126 + ... + 5300289961.

It is an arithmetic number, because the mean of its divisors is an integer number (2194319250216).

Almost surely, 2^{20331904934866} is an apocalyptic number.

20331904934866 is a deficient number, since it is larger than the sum of its proper divisors (14777203068590).

20331904934866 is a wasteful number, since it uses less digits than its factorization.

20331904934866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600576233.

The product of its (nonzero) digits is 20155392, while the sum is 58.

The spelling of 20331904934866 in words is "twenty trillion, three hundred thirty-one billion, nine hundred four million, nine hundred thirty-four thousand, eight hundred sixty-six".