21463130 has 32 divisors (see below), whose sum is σ = 42021504. Its totient is φ = 7845696.

The previous prime is 21463111. The next prime is 21463133. The reversal of 21463130 is 3136412.

It is not an unprimeable number, because it can be changed into a prime (21463133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13139 + ... + 14681.

It is an arithmetic number, because the mean of its divisors is an integer number (1313172).

Almost surely, 2^21463130 is an apocalyptic number.

21463130 is a deficient number, since it is larger than the sum of its proper divisors (20558374).

21463130 is a wasteful number, since it uses less digits than its factorization.

21463130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 21463130 is about 4632.8317474305. The cubic root of 21463130 is about 277.9058477292.

Adding to 21463130 its reverse (3136412), we get a palindrome (24599542).

The spelling of 21463130 in words is "twenty-one million, four hundred sixty-three thousand, one hundred thirty".