21412037685 has 16 divisors (see below), whose sum is σ = 34261242624. Its totient is φ = 11419092672.

The previous prime is 21412037653. The next prime is 21412037719. The reversal of 21412037685 is 58673021412.

It is not a de Polignac number, because 21412037685 - 2⁵ = 21412037653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340359 + ... + 398331.

It is an arithmetic number, because the mean of its divisors is an integer number (2141327664).

Almost surely, 2^21412037685 is an apocalyptic number.

It is an amenable number.

21412037685 is a deficient number, since it is larger than the sum of its proper divisors (12849204939).

21412037685 is a wasteful number, since it uses less digits than its factorization.

21412037685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82604.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 21412037685 in words is "twenty-one billion, four hundred twelve million, thirty-seven thousand, six hundred eighty-five".