21960542 has 8 divisors (see below), whose sum is σ = 34674600. Its totient is φ = 10402344.

The previous prime is 21960539. The next prime is 21960551. The reversal of 21960542 is 24506912.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288917 + ... + 288992.

It is an arithmetic number, because the mean of its divisors is an integer number (4334325).

Almost surely, 2^21960542 is an apocalyptic number.

21960542 is a deficient number, since it is larger than the sum of its proper divisors (12714058).

21960542 is a wasteful number, since it uses less digits than its factorization.

21960542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577930.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 21960542 is about 4686.2076351779. The cubic root of 21960542 is about 280.0363133175.

The spelling of 21960542 in words is "twenty-one million, nine hundred sixty thousand, five hundred forty-two".