21461342 has 16 divisors (see below), whose sum is σ = 37007712. Its totient is φ = 9143520.

The previous prime is 21461329. The next prime is 21461357. The reversal of 21461342 is 24316412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2009 + ... + 6852.

It is an arithmetic number, because the mean of its divisors is an integer number (2312982).

Almost surely, 2^21461342 is an apocalyptic number.

21461342 is a deficient number, since it is larger than the sum of its proper divisors (15546370).

21461342 is a wasteful number, since it uses less digits than its factorization.

21461342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9043.

The product of its digits is 1152, while the sum is 23.

The square root of 21461342 is about 4632.6387728810. The cubic root of 21461342 is about 277.8981304725.

Adding to 21461342 its reverse (24316412), we get a palindrome (45777754).

The spelling of 21461342 in words is "twenty-one million, four hundred sixty-one thousand, three hundred forty-two".