21132003004 has 24 divisors (see below), whose sum is σ = 42738887520. Its totient is φ = 8954812416.

The previous prime is 21132002993. The next prime is 21132003049. The reversal of 21132003004 is 40030023112.

It is a happy number.

It is a super-2 number, since 2×21132003004² (a number of 21 digits) contains 22 as substring.

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, 4237477 + ... + 4242460.

It is an arithmetic number, because the mean of its divisors is an integer number (1780786980).

Almost surely, 2^21132003004 is an apocalyptic number.

It is an amenable number.

21132003004 is an abundant number, since it is smaller than the sum of its proper divisors (21606884516).

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

21132003004 is a wasteful number, since it uses less digits than its factorization.

21132003004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8480037 (or 8480035 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21132003004 its reverse (40030023112), we get a palindrome (61162026116).

The spelling of 21132003004 in words is "twenty-one billion, one hundred thirty-two million, three thousand, four".