21699884493 has 24 divisors (see below), whose sum is σ = 35829331200. Its totient is φ = 12397407264.

The previous prime is 21699884483. The next prime is 21699884501. The reversal of 21699884493 is 39448899612.

21699884493 is a `hidden beast` number, since 2 + 1 + 69 + 9 + 8 + 84 + 493 = 666.

It is not a de Polignac number, because 21699884493 - 2²⁸ = 21431449037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 21699884493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21699884483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 302028 + ... + 366906.

It is an arithmetic number, because the mean of its divisors is an integer number (1492888800).

Almost surely, 2^21699884493 is an apocalyptic number.

It is an amenable number.

21699884493 is a deficient number, since it is larger than the sum of its proper divisors (14129446707).

21699884493 is a wasteful number, since it uses less digits than its factorization.

21699884493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70201 (or 70198 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The spelling of 21699884493 in words is "twenty-one billion, six hundred ninety-nine million, eight hundred eighty-four thousand, four hundred ninety-three".