21092072319 has 12 divisors (see below), whose sum is σ = 30467623992. Its totient is φ = 14060782800.

The previous prime is 21092072293. The next prime is 21092072321. The reversal of 21092072319 is 91327029012.

21092072319 is a `hidden beast` number, since 210 + 9 + 207 + 231 + 9 = 666.

It is not a de Polignac number, because 21092072319 - 2¹¹ = 21092070271 is a prime.

It is a super-2 number, since 2×21092072319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21092072369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 309309 + ... + 371289.

It is an arithmetic number, because the mean of its divisors is an integer number (2538968666).

Almost surely, 2^21092072319 is an apocalyptic number.

21092072319 is a deficient number, since it is larger than the sum of its proper divisors (9375551673).

21092072319 is a wasteful number, since it uses less digits than its factorization.

21092072319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99798 (or 99795 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The spelling of 21092072319 in words is "twenty-one billion, ninety-two million, seventy-two thousand, three hundred nineteen".