21356044527 has 8 divisors (see below), whose sum is σ = 28540489264. Its totient is φ = 14204481408.

The previous prime is 21356044513. The next prime is 21356044529. The reversal of 21356044527 is 72544065312.

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

It is not a de Polignac number, because 21356044527 - 2⁸ = 21356044271 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 (21356044529) 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, 8218888 + ... + 8221485.

It is an arithmetic number, because the mean of its divisors is an integer number (3567561158).

Almost surely, 2^21356044527 is an apocalyptic number.

21356044527 is a deficient number, since it is larger than the sum of its proper divisors (7184444737).

21356044527 is a wasteful number, since it uses less digits than its factorization.

21356044527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16440809.

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 21356044527 in words is "twenty-one billion, three hundred fifty-six million, forty-four thousand, five hundred twenty-seven".