21460789 has 8 divisors (see below), whose sum is σ = 24557120. Its totient is φ = 18372096.

The previous prime is 21460787. The next prime is 21460793. The reversal of 21460789 is 98706412.

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

It is a cyclic number.

It is not a de Polignac number, because 21460789 - 2¹ = 21460787 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21460787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6742 + ... + 9400.

It is an arithmetic number, because the mean of its divisors is an integer number (3069640).

Almost surely, 2^21460789 is an apocalyptic number.

It is an amenable number.

21460789 is a deficient number, since it is larger than the sum of its proper divisors (3096331).

21460789 is a wasteful number, since it uses less digits than its factorization.

21460789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 21460789 is about 4632.5790872904. The cubic root of 21460789 is about 277.8957435608.

The spelling of 21460789 in words is "twenty-one million, four hundred sixty thousand, seven hundred eighty-nine".