21294352827 has 36 divisors (see below), whose sum is σ = 33841924480. Its totient is φ = 12893078880.

The previous prime is 21294352757. The next prime is 21294352853. The reversal of 21294352827 is 72825349212.

21294352827 is a `hidden beast` number, since 2 + 1 + 294 + 352 + 8 + 2 + 7 = 666.

It is not a de Polignac number, because 21294352827 - 2¹⁹ = 21293828539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21294352127) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1174749 + ... + 1192737.

Almost surely, 2^21294352827 is an apocalyptic number.

21294352827 is a deficient number, since it is larger than the sum of its proper divisors (12547571653).

21294352827 is a wasteful number, since it uses less digits than its factorization.

21294352827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19104 (or 19090 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 21294352827 in words is "twenty-one billion, two hundred ninety-four million, three hundred fifty-two thousand, eight hundred twenty-seven".