21327542 has 8 divisors (see below), whose sum is σ = 32203632. Its totient is φ = 10593000.

The previous prime is 21327541. The next prime is 21327563. The reversal of 21327542 is 24572312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21327541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35009 + ... + 35612.

It is an arithmetic number, because the mean of its divisors is an integer number (4025454).

Almost surely, 2^21327542 is an apocalyptic number.

21327542 is a deficient number, since it is larger than the sum of its proper divisors (10876090).

21327542 is a wasteful number, since it uses less digits than its factorization.

21327542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70774.

The product of its digits is 3360, while the sum is 26.

The square root of 21327542 is about 4618.1751807397. The cubic root of 21327542 is about 277.3194106798.

Adding to 21327542 its reverse (24572312), we get a palindrome (45899854).

The spelling of 21327542 in words is "twenty-one million, three hundred twenty-seven thousand, five hundred forty-two".