21314542 has 16 divisors (see below), whose sum is σ = 33753600. Its totient is φ = 10066680.

The previous prime is 21314497. The next prime is 21314543. The reversal of 21314542 is 24541312.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314543) 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, 17617 + ... + 18787.

It is an arithmetic number, because the mean of its divisors is an integer number (2109600).

Almost surely, 2^21314542 is an apocalyptic number.

21314542 is a deficient number, since it is larger than the sum of its proper divisors (12439058).

21314542 is a wasteful number, since it uses less digits than its factorization.

21314542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671.

The product of its digits is 960, while the sum is 22.

The square root of 21314542 is about 4616.7674838571. The cubic root of 21314542 is about 277.2630534261.

Adding to 21314542 its reverse (24541312), we get a palindrome (45855854).

The spelling of 21314542 in words is "twenty-one million, three hundred fourteen thousand, five hundred forty-two".