21445702 has 8 divisors (see below), whose sum is σ = 32253696. Its totient is φ = 10694472.

The previous prime is 21445673. The next prime is 21445717. The reversal of 21445702 is 20754412.

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, 13233 + ... + 14764.

It is an arithmetic number, because the mean of its divisors is an integer number (4031712).

Almost surely, 2^21445702 is an apocalyptic number.

21445702 is a deficient number, since it is larger than the sum of its proper divisors (10807994).

21445702 is a wasteful number, since it uses less digits than its factorization.

21445702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28382.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 21445702 is about 4630.9504424038. The cubic root of 21445702 is about 277.8306077769.

The spelling of 21445702 in words is "twenty-one million, four hundred forty-five thousand, seven hundred two".