21923752775 has 48 divisors (see below), whose sum is σ = 30233779200. Its totient is φ = 15701132160.

The previous prime is 21923752771. The next prime is 21923752787. The reversal of 21923752775 is 57725732912.

It is not a de Polignac number, because 21923752775 - 2² = 21923752771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21923752771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 630494 + ... + 664356.

It is an arithmetic number, because the mean of its divisors is an integer number (629870400).

Almost surely, 2^21923752775 is an apocalyptic number.

21923752775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21923752775 is a deficient number, since it is larger than the sum of its proper divisors (8310026425).

21923752775 is a wasteful number, since it uses less digits than its factorization.

21923752775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33968 (or 33963 counting only the distinct ones).

The product of its digits is 1852200, while the sum is 50.

The spelling of 21923752775 in words is "twenty-one billion, nine hundred twenty-three million, seven hundred fifty-two thousand, seven hundred seventy-five".