21883078723 has 4 divisors (see below), whose sum is σ = 23872449528. Its totient is φ = 19893707920.

The previous prime is 21883078703. The next prime is 21883078727. The reversal of 21883078723 is 32787038812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21883078723 - 2⁹ = 21883078211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21883078727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994685386 + ... + 994685407.

It is an arithmetic number, because the mean of its divisors is an integer number (5968112382).

Almost surely, 2^21883078723 is an apocalyptic number.

21883078723 is a deficient number, since it is larger than the sum of its proper divisors (1989370805).

21883078723 is a wasteful number, since it uses less digits than its factorization.

21883078723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989370804.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 21883078723 in words is "twenty-one billion, eight hundred eighty-three million, seventy-eight thousand, seven hundred twenty-three".