21034231000 has 32 divisors (see below), whose sum is σ = 49220102880. Its totient is φ = 8413692000.

The previous prime is 21034230979. The next prime is 21034231003. The reversal of 21034231000 is 13243012.

It is a happy number.

It is a super-2 number, since 2×21034231000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034231003) 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 7 ways as a sum of consecutive naturals, for example, 10516116 + ... + 10518115.

It is an arithmetic number, because the mean of its divisors is an integer number (1538128215).

Almost surely, 2^21034231000 is an apocalyptic number.

21034231000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21034231000 is an abundant number, since it is smaller than the sum of its proper divisors (28185871880).

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

21034231000 is a wasteful number, since it uses less digits than its factorization.

21034231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21034252 (or 21034238 counting only the distinct ones).

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

Adding to 21034231000 its reverse (13243012), we get a palindrome (21047474012).

The spelling of 21034231000 in words is "twenty-one billion, thirty-four million, two hundred thirty-one thousand".