21031333000 has 32 divisors (see below), whose sum is σ = 49213321560. Its totient is φ = 8412532800.

The previous prime is 21031332979. The next prime is 21031333013. The reversal of 21031333000 is 33313012.

It can be written as a sum of positive squares in 4 ways, for example, as 1572756964 + 19458576036 = 39658^2 + 139494^2 .

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, 10514667 + ... + 10516666.

Almost surely, 2^21031333000 is an apocalyptic number.

21031333000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21031333000 is an abundant number, since it is smaller than the sum of its proper divisors (28181988560).

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

21031333000 is a wasteful number, since it uses less digits than its factorization.

21031333000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21031354 (or 21031340 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 21031333000 its reverse (33313012), we get a palindrome (21064646012).

The spelling of 21031333000 in words is "twenty-one billion, thirty-one million, three hundred thirty-three thousand".