21337869 has 8 divisors (see below), whose sum is σ = 32514880. Its totient is φ = 12193056.

The previous prime is 21337867. The next prime is 21337891. The reversal of 21337869 is 96873312.

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

It is not a de Polignac number, because 21337869 - 2¹ = 21337867 is a prime.

It is a super-2 number, since 2×21337869² = 910609306922322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21337867) 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, 508024 + ... + 508065.

It is an arithmetic number, because the mean of its divisors is an integer number (4064360).

Almost surely, 2^21337869 is an apocalyptic number.

It is an amenable number.

21337869 is a deficient number, since it is larger than the sum of its proper divisors (11177011).

21337869 is a wasteful number, since it uses less digits than its factorization.

21337869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016099.

The product of its digits is 54432, while the sum is 39.

The square root of 21337869 is about 4619.2931277415. The cubic root of 21337869 is about 277.3641636951.

The spelling of 21337869 in words is "twenty-one million, three hundred thirty-seven thousand, eight hundred sixty-nine".