21132042003 has 24 divisors (see below), whose sum is σ = 32150343680. Its totient is φ = 13338347760.

The previous prime is 21132041999. The next prime is 21132042023. The reversal of 21132042003 is 30024023112.

21132042003 is a `hidden beast` number, since 211 + 32 + 0 + 420 + 0 + 3 = 666.

It is not a de Polignac number, because 21132042003 - 2² = 21132041999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132042023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247218 + ... + 321528.

Almost surely, 2^21132042003 is an apocalyptic number.

21132042003 is a deficient number, since it is larger than the sum of its proper divisors (11018301677).

21132042003 is a wasteful number, since it uses less digits than its factorization.

21132042003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75999 (or 75996 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21132042003 its reverse (30024023112), we get a palindrome (51156065115).

The spelling of 21132042003 in words is "twenty-one billion, one hundred thirty-two million, forty-two thousand, three".