21680433093 has 24 divisors (see below), whose sum is σ = 31785293344. Its totient is φ = 13135019040.

The previous prime is 21680433083. The next prime is 21680433097. The reversal of 21680433093 is 39033408612.

It is not a de Polignac number, because 21680433093 - 2¹⁰ = 21680432069 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 (21680433097) 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, 1215546 + ... + 1233252.

Almost surely, 2^21680433093 is an apocalyptic number.

It is an amenable number.

21680433093 is a deficient number, since it is larger than the sum of its proper divisors (10104860251).

21680433093 is a wasteful number, since it uses less digits than its factorization.

21680433093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21105 (or 21094 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 21680433093 in words is "twenty-one billion, six hundred eighty million, four hundred thirty-three thousand, ninety-three".