21775654423 has 8 divisors (see below), whose sum is σ = 22100616720. Its totient is φ = 21452941440.

The previous prime is 21775654391. The next prime is 21775654427. The reversal of 21775654423 is 32445657712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21775654423 - 2⁵ = 21775654391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21775654427) 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, 542818 + ... + 581551.

It is an arithmetic number, because the mean of its divisors is an integer number (2762577090).

Almost surely, 2^21775654423 is an apocalyptic number.

21775654423 is a deficient number, since it is larger than the sum of its proper divisors (324962297).

21775654423 is a wasteful number, since it uses less digits than its factorization.

21775654423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124657.

The product of its digits is 1411200, while the sum is 46.

The spelling of 21775654423 in words is "twenty-one billion, seven hundred seventy-five million, six hundred fifty-four thousand, four hundred twenty-three".