21416587737 has 8 divisors (see below), whose sum is σ = 28578803904. Its totient is φ = 14266048368.

The previous prime is 21416587679. The next prime is 21416587763. The reversal of 21416587737 is 73778561412.

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

It is not a de Polignac number, because 21416587737 - 2⁸ = 21416587481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21416587737.

It is not an unprimeable number, because it can be changed into a prime (21416507737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2914918 + ... + 2922255.

It is an arithmetic number, because the mean of its divisors is an integer number (3572350488).

Almost surely, 2^21416587737 is an apocalyptic number.

It is an amenable number.

21416587737 is a deficient number, since it is larger than the sum of its proper divisors (7162216167).

21416587737 is a wasteful number, since it uses less digits than its factorization.

21416587737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5838399.

The product of its digits is 1975680, while the sum is 51.

The spelling of 21416587737 in words is "twenty-one billion, four hundred sixteen million, five hundred eighty-seven thousand, seven hundred thirty-seven".