21285014537 has 16 divisors (see below), whose sum is σ = 22720526400. Its totient is φ = 19882998720.

The previous prime is 21285014533. The next prime is 21285014549. The reversal of 21285014537 is 73541058212.

It is a cyclic number.

It is not a de Polignac number, because 21285014537 - 2² = 21285014533 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 21285014537.

It is not an unprimeable number, because it can be changed into a prime (21285014533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363539 + ... + 418007.

It is an arithmetic number, because the mean of its divisors is an integer number (1420032900).

Almost surely, 2^21285014537 is an apocalyptic number.

It is an amenable number.

21285014537 is a deficient number, since it is larger than the sum of its proper divisors (1435511863).

21285014537 is a wasteful number, since it uses less digits than its factorization.

21285014537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54776.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 21285014537 in words is "twenty-one billion, two hundred eighty-five million, fourteen thousand, five hundred thirty-seven".