21086064373 has 16 divisors (see below), whose sum is σ = 23606614080. Its totient is φ = 18667811200.

The previous prime is 21086064367. The next prime is 21086064383. The reversal of 21086064373 is 37346068012.

It is a cyclic number.

It is not a de Polignac number, because 21086064373 - 2¹³ = 21086056181 is a prime.

It is a super-2 number, since 2×21086064373² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21086064383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209238 + ... + 293176.

It is an arithmetic number, because the mean of its divisors is an integer number (1475413380).

Almost surely, 2^21086064373 is an apocalyptic number.

It is an amenable number.

21086064373 is a deficient number, since it is larger than the sum of its proper divisors (2520549707).

21086064373 is a wasteful number, since it uses less digits than its factorization.

21086064373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84548.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 21086064373 in words is "twenty-one billion, eighty-six million, sixty-four thousand, three hundred seventy-three".