21030003234 has 24 divisors (see below), whose sum is σ = 45581383692. Its totient is φ = 7007481600.

The previous prime is 21030003233. The next prime is 21030003251. The reversal of 21030003234 is 43230003012.

It can be written as a sum of positive squares in 2 ways, for example, as 20276336025 + 753667209 = 142395^2 + 27453^2 .

It is a super-2 number, since 2×21030003234² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21030003233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158139 + ... + 258974.

Almost surely, 2^21030003234 is an apocalyptic number.

21030003234 is an abundant number, since it is smaller than the sum of its proper divisors (24551380458).

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

21030003234 is a wasteful number, since it uses less digits than its factorization.

21030003234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419922 (or 419919 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21030003234 its reverse (43230003012), we get a palindrome (64260006246).

The spelling of 21030003234 in words is "twenty-one billion, thirty million, three thousand, two hundred thirty-four".