21734027 has 8 divisors (see below), whose sum is σ = 24871392. Its totient is φ = 18604800.

The previous prime is 21734017. The next prime is 21734029. The reversal of 21734027 is 72043712.

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

It is a cyclic number.

It is not a de Polignac number, because 21734027 - 2¹⁰ = 21733003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21733987 and 21734005.

It is not an unprimeable number, because it can be changed into a prime (21734029) 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, 5627 + ... + 8667.

It is an arithmetic number, because the mean of its divisors is an integer number (3108924).

Almost surely, 2^21734027 is an apocalyptic number.

21734027 is a deficient number, since it is larger than the sum of its proper divisors (3137365).

21734027 is a wasteful number, since it uses less digits than its factorization.

21734027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 21734027 is about 4661.9767266686. The cubic root of 21734027 is about 279.0701595973.

Adding to 21734027 its reverse (72043712), we get a palindrome (93777739).

The spelling of 21734027 in words is "twenty-one million, seven hundred thirty-four thousand, twenty-seven".