21929350 has 24 divisors (see below), whose sum is σ = 42564240. Its totient is φ = 8389920.

The previous prime is 21929339. The next prime is 21929357. The reversal of 21929350 is 5392912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21929357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8385 + ... + 10684.

It is an arithmetic number, because the mean of its divisors is an integer number (1773510).

Almost surely, 2^21929350 is an apocalyptic number.

21929350 is a deficient number, since it is larger than the sum of its proper divisors (20634890).

21929350 is a wasteful number, since it uses less digits than its factorization.

21929350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19104 (or 19099 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 21929350 is about 4682.8783883419. The cubic root of 21929350 is about 279.9036658396.

The spelling of 21929350 in words is "twenty-one million, nine hundred twenty-nine thousand, three hundred fifty".