21523044002751 has 12 divisors (see below), whose sum is σ = 31118087674128. Its totient is φ = 14335197692544.

The previous prime is 21523044002729. The next prime is 21523044002767. The reversal of 21523044002751 is 15720044032512.

21523044002751 is a `hidden beast` number, since 2 + 15 + 230 + 4 + 400 + 2 + 7 + 5 + 1 = 666.

It is not a de Polignac number, because 21523044002751 - 2¹⁰ = 21523044001727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523044002701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1124849010 + ... + 1124868143.

It is an arithmetic number, because the mean of its divisors is an integer number (2593173972844).

Almost surely, 2^{21523044002751} is an apocalyptic number.

21523044002751 is a deficient number, since it is larger than the sum of its proper divisors (9595043671377).

21523044002751 is a wasteful number, since it uses less digits than its factorization.

21523044002751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249718222 (or 2249718219 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 21523044002751 in words is "twenty-one trillion, five hundred twenty-three billion, forty-four million, two thousand, seven hundred fifty-one".