21401734 has 8 divisors (see below), whose sum is σ = 32123088. Its totient is φ = 10694040.

The previous prime is 21401717. The next prime is 21401761. The reversal of 21401734 is 43710412.

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, 2679 + ... + 7069.

It is an arithmetic number, because the mean of its divisors is an integer number (4015386).

Almost surely, 2^21401734 is an apocalyptic number.

21401734 is a deficient number, since it is larger than the sum of its proper divisors (10721354).

21401734 is a wasteful number, since it uses less digits than its factorization.

21401734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6830.

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

The square root of 21401734 is about 4626.2008170852. The cubic root of 21401734 is about 277.6406083407.

The spelling of 21401734 in words is "twenty-one million, four hundred one thousand, seven hundred thirty-four".