21829056523 has 32 divisors (see below), whose sum is σ = 23473800000. Its totient is φ = 20264165376.

The previous prime is 21829056427. The next prime is 21829056541. The reversal of 21829056523 is 32565092812.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21829056523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21829056523.

It is not an unprimeable number, because it can be changed into a prime (21829056583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17476603 + ... + 17477851.

It is an arithmetic number, because the mean of its divisors is an integer number (733556250).

Almost surely, 2^21829056523 is an apocalyptic number.

21829056523 is a deficient number, since it is larger than the sum of its proper divisors (1644743477).

21829056523 is a wasteful number, since it uses less digits than its factorization.

21829056523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 21829056523 in words is "twenty-one billion, eight hundred twenty-nine million, fifty-six thousand, five hundred twenty-three".