20864878073 has 24 divisors (see below), whose sum is σ = 24694142976. Its totient is φ = 17542137600.

The previous prime is 20864878049. The next prime is 20864878079. The reversal of 20864878073 is 37087846802.

It is not a de Polignac number, because 20864878073 - 2²⁴ = 20848100857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20864878079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28073 + ... + 206198.

It is an arithmetic number, because the mean of its divisors is an integer number (1028922624).

Almost surely, 2^20864878073 is an apocalyptic number.

It is an amenable number.

20864878073 is a deficient number, since it is larger than the sum of its proper divisors (3829264903).

20864878073 is a wasteful number, since it uses less digits than its factorization.

20864878073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234345 (or 234332 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 53.

The spelling of 20864878073 in words is "twenty billion, eight hundred sixty-four million, eight hundred seventy-eight thousand, seventy-three".