21068294499 has 24 divisors (see below), whose sum is σ = 34874211840. Its totient is φ = 12006208368.

The previous prime is 21068294461. The next prime is 21068294503. The reversal of 21068294499 is 99449286012.

21068294499 is a `hidden beast` number, since 2 + 1 + 0 + 68 + 2 + 94 + 499 = 666.

It is not a de Polignac number, because 21068294499 - 2¹¹ = 21068292451 is a prime.

It is a super-2 number, since 2×21068294499² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21068294449) 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, 432489 + ... + 478730.

It is an arithmetic number, because the mean of its divisors is an integer number (1453092160).

Almost surely, 2^21068294499 is an apocalyptic number.

21068294499 is a deficient number, since it is larger than the sum of its proper divisors (13805917341).

21068294499 is a wasteful number, since it uses less digits than its factorization.

21068294499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911599 (or 911596 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 21068294499 in words is "twenty-one billion, sixty-eight million, two hundred ninety-four thousand, four hundred ninety-nine".