21733929 has 48 divisors (see below), whose sum is σ = 38471680. Its totient is φ = 11547360.

The previous prime is 21733913. The next prime is 21733969. The reversal of 21733929 is 92933712.

It is not a de Polignac number, because 21733929 - 2⁴ = 21733913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21733893 and 21733902.

It is not an unprimeable number, because it can be changed into a prime (21733909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80064 + ... + 80334.

Almost surely, 2^21733929 is an apocalyptic number.

It is an amenable number.

21733929 is a deficient number, since it is larger than the sum of its proper divisors (16737751).

21733929 is a wasteful number, since it uses less digits than its factorization.

21733929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 367 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 21733929 is about 4661.9662160938. The cubic root of 21733929 is about 279.0697401487.

The spelling of 21733929 in words is "twenty-one million, seven hundred thirty-three thousand, nine hundred twenty-nine".