21948710 has 16 divisors (see below), whose sum is σ = 45151776. Its totient is φ = 7525248.

The previous prime is 21948673. The next prime is 21948721. The reversal of 21948710 is 1784912.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 156707 + ... + 156846.

It is an arithmetic number, because the mean of its divisors is an integer number (2821986).

Almost surely, 2^21948710 is an apocalyptic number.

21948710 is an abundant number, since it is smaller than the sum of its proper divisors (23203066).

21948710 is a wasteful number, since it uses less digits than its factorization.

21948710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313567.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 21948710 is about 4684.9450370309. The cubic root of 21948710 is about 279.9860112059.

The spelling of 21948710 in words is "twenty-one million, nine hundred forty-eight thousand, seven hundred ten".