21632766349 has 8 divisors (see below), whose sum is σ = 21741668480. Its totient is φ = 21523924800.

The previous prime is 21632766347. The next prime is 21632766367. The reversal of 21632766349 is 94366723612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21632766349 - 2¹ = 21632766347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632766343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813829 + ... + 839989.

It is an arithmetic number, because the mean of its divisors is an integer number (2717708560).

Almost surely, 2^21632766349 is an apocalyptic number.

It is an amenable number.

21632766349 is a deficient number, since it is larger than the sum of its proper divisors (108902131).

21632766349 is a wasteful number, since it uses less digits than its factorization.

21632766349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30291.

The product of its digits is 1959552, while the sum is 49.

The spelling of 21632766349 in words is "twenty-one billion, six hundred thirty-two million, seven hundred sixty-six thousand, three hundred forty-nine".