20673212747 has 16 divisors (see below), whose sum is σ = 22931151360. Its totient is φ = 18478605600.

The previous prime is 20673212737. The next prime is 20673212759. The reversal of 20673212747 is 74721237602.

It is a cyclic number.

It is not a de Polignac number, because 20673212747 - 2²⁰ = 20672164171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20673212717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2561204 + ... + 2569262.

It is an arithmetic number, because the mean of its divisors is an integer number (1433196960).

Almost surely, 2^20673212747 is an apocalyptic number.

20673212747 is a deficient number, since it is larger than the sum of its proper divisors (2257938613).

20673212747 is a wasteful number, since it uses less digits than its factorization.

20673212747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11954.

The product of its (nonzero) digits is 197568, while the sum is 41.

The spelling of 20673212747 in words is "twenty billion, six hundred seventy-three million, two hundred twelve thousand, seven hundred forty-seven".