21984432933 has 8 divisors (see below), whose sum is σ = 29320259968. Its totient is φ = 14652447264.

The previous prime is 21984432893. The next prime is 21984432941. The reversal of 21984432933 is 33923448912.

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

It is not a de Polignac number, because 21984432933 - 2¹⁶ = 21984367397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21984434933) 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, 946960 + ... + 969897.

It is an arithmetic number, because the mean of its divisors is an integer number (3665032496).

Almost surely, 2^21984432933 is an apocalyptic number.

It is an amenable number.

21984432933 is a deficient number, since it is larger than the sum of its proper divisors (7335827035).

21984432933 is a wasteful number, since it uses less digits than its factorization.

21984432933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920683.

The product of its digits is 1119744, while the sum is 48.

The spelling of 21984432933 in words is "twenty-one billion, nine hundred eighty-four million, four hundred thirty-two thousand, nine hundred thirty-three".