21463242 has 16 divisors (see below), whose sum is σ = 43241472. Its totient is φ = 7101920.

The previous prime is 21463223. The next prime is 21463271. The reversal of 21463242 is 24236412.

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, 12234 + ... + 13877.

It is an arithmetic number, because the mean of its divisors is an integer number (2702592).

Almost surely, 2^21463242 is an apocalyptic number.

21463242 is an abundant number, since it is smaller than the sum of its proper divisors (21778230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21463242 is a wasteful number, since it uses less digits than its factorization.

21463242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26253.

The product of its digits is 2304, while the sum is 24.

The square root of 21463242 is about 4632.8438350542. The cubic root of 21463242 is about 277.9063311225.

Adding to 21463242 its reverse (24236412), we get a palindrome (45699654).

The spelling of 21463242 in words is "twenty-one million, four hundred sixty-three thousand, two hundred forty-two".