20366720764 has 24 divisors (see below), whose sum is σ = 39707004960. Its totient is φ = 9075885504.

The previous prime is 20366720761. The next prime is 20366720813. The reversal of 20366720764 is 46702766302.

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 20366720764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20366720761) 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, 6751384 + ... + 6754399.

It is an arithmetic number, because the mean of its divisors is an integer number (1654458540).

Almost surely, 2^20366720764 is an apocalyptic number.

It is an amenable number.

20366720764 is a deficient number, since it is larger than the sum of its proper divisors (19340284196).

20366720764 is a wasteful number, since it uses less digits than its factorization.

20366720764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13505829 (or 13505827 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 43.

The spelling of 20366720764 in words is "twenty billion, three hundred sixty-six million, seven hundred twenty thousand, seven hundred sixty-four".