21942096 has 80 divisors (see below), whose sum is σ = 64013760. Its totient is φ = 6415360.

The previous prime is 21942077. The next prime is 21942113. The reversal of 21942096 is 69024912.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14596 + ... + 16028.

It is an arithmetic number, because the mean of its divisors is an integer number (800172).

Almost surely, 2^21942096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21942096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32006880).

21942096 is an abundant number, since it is smaller than the sum of its proper divisors (42071664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21942096 is a wasteful number, since it uses less digits than its factorization.

21942096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 21942096 is about 4684.2391057673. The cubic root of 21942096 is about 279.9578848222.

The spelling of 21942096 in words is "twenty-one million, nine hundred forty-two thousand, ninety-six".