21766270054 has 4 divisors (see below), whose sum is σ = 32649405084. Its totient is φ = 10883135026.

The previous prime is 21766270051. The next prime is 21766270103. The reversal of 21766270054 is 45007266712.

21766270054 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 21766269989 and 21766270016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21766270051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5441567512 + ... + 5441567515.

It is an arithmetic number, because the mean of its divisors is an integer number (8162351271).

Almost surely, 2^21766270054 is an apocalyptic number.

21766270054 is a deficient number, since it is larger than the sum of its proper divisors (10883135030).

21766270054 is a wasteful number, since it uses less digits than its factorization.

21766270054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10883135029.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 21766270054 in words is "twenty-one billion, seven hundred sixty-six million, two hundred seventy thousand, fifty-four".