21337071 has 8 divisors (see below), whose sum is σ = 32513664. Its totient is φ = 12192600.

The previous prime is 21337061. The next prime is 21337081. The reversal of 21337071 is 17073312.

It is an interprime number because it is at equal distance from previous prime (21337061) and next prime (21337081).

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

It is not a de Polignac number, because 21337071 - 2⁹ = 21336559 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21337061) 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, 508005 + ... + 508046.

It is an arithmetic number, because the mean of its divisors is an integer number (4064208).

Almost surely, 2^21337071 is an apocalyptic number.

21337071 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21337071 is a deficient number, since it is larger than the sum of its proper divisors (11176593).

21337071 is a wasteful number, since it uses less digits than its factorization.

21337071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016061.

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

The square root of 21337071 is about 4619.2067500817. The cubic root of 21337071 is about 277.3607060027.

The spelling of 21337071 in words is "twenty-one million, three hundred thirty-seven thousand, seventy-one".