21746030 has 8 divisors (see below), whose sum is σ = 39142872. Its totient is φ = 8698408.

The previous prime is 21746029. The next prime is 21746057. The reversal of 21746030 is 3064712.

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

It is a junction number, because it is equal to n+sod(n) for n = 21745987 and 21746005.

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, 1087292 + ... + 1087311.

It is an arithmetic number, because the mean of its divisors is an integer number (4892859).

Almost surely, 2^21746030 is an apocalyptic number.

21746030 is a deficient number, since it is larger than the sum of its proper divisors (17396842).

21746030 is a wasteful number, since it uses less digits than its factorization.

21746030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174610.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 21746030 is about 4663.2638784439. The cubic root of 21746030 is about 279.1215239498.

The spelling of 21746030 in words is "twenty-one million, seven hundred forty-six thousand, thirty".