21434710 has 16 divisors (see below), whose sum is σ = 42090192. Its totient is φ = 7794400.

The previous prime is 21434681. The next prime is 21434719. The reversal of 21434710 is 1743412.

It is a super-3 number, since 3×21434710³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97321 + ... + 97540.

It is an arithmetic number, because the mean of its divisors is an integer number (2630637).

Almost surely, 2^21434710 is an apocalyptic number.

21434710 is a deficient number, since it is larger than the sum of its proper divisors (20655482).

21434710 is a wasteful number, since it uses less digits than its factorization.

21434710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194879.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 21434710 is about 4629.7634928795. The cubic root of 21434710 is about 277.7831322820.

The spelling of 21434710 in words is "twenty-one million, four hundred thirty-four thousand, seven hundred ten".