21373701 has 16 divisors (see below), whose sum is σ = 29008320. Its totient is φ = 13996800.

The previous prime is 21373699. The next prime is 21373711. The reversal of 21373701 is 10737312.

It is not a de Polignac number, because 21373701 - 2¹ = 21373699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53101 + ... + 53501.

It is an arithmetic number, because the mean of its divisors is an integer number (1813020).

Almost surely, 2^21373701 is an apocalyptic number.

It is an amenable number.

21373701 is a deficient number, since it is larger than the sum of its proper divisors (7634619).

21373701 is a wasteful number, since it uses less digits than its factorization.

21373701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 21373701 is about 4623.1700163416. The cubic root of 21373701 is about 277.5193331227.

The spelling of 21373701 in words is "twenty-one million, three hundred seventy-three thousand, seven hundred one".