20326401650566 has 32 divisors (see below), whose sum is σ = 33316704721440. Its totient is φ = 9223911840000.

The previous prime is 20326401650551. The next prime is 20326401650647. The reversal of 20326401650566 is 66505610462302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81807850 + ... + 82055938.

It is an arithmetic number, because the mean of its divisors is an integer number (1041147022545).

Almost surely, 2^{20326401650566} is an apocalyptic number.

20326401650566 is a deficient number, since it is larger than the sum of its proper divisors (12990303070874).

20326401650566 is a wasteful number, since it uses less digits than its factorization.

20326401650566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254280.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 20326401650566 in words is "twenty trillion, three hundred twenty-six billion, four hundred one million, six hundred fifty thousand, five hundred sixty-six".