21323315000 has 80 divisors (see below), whose sum is σ = 53803808520. Its totient is φ = 7873200000.

The previous prime is 21323314993. The next prime is 21323315017. The reversal of 21323315000 is 51332312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 99026 + ... + 229025.

Almost surely, 2^21323315000 is an apocalyptic number.

21323315000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323315000 is an abundant number, since it is smaller than the sum of its proper divisors (32480493520).

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

21323315000 is a wasteful number, since it uses less digits than its factorization.

21323315000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328090 (or 328071 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 21323315000 its reverse (51332312), we get a palindrome (21374647312).

The spelling of 21323315000 in words is "twenty-one billion, three hundred twenty-three million, three hundred fifteen thousand".