21313433000 has 64 divisors (see below), whose sum is σ = 52041899520. Its totient is φ = 8154696000.

The previous prime is 21313432969. The next prime is 21313433003. The reversal of 21313433000 is 33431312.

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

It is not an unprimeable number, because it can be changed into a prime (21313433003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440336 + ... + 486335.

It is an arithmetic number, because the mean of its divisors is an integer number (813154680).

Almost surely, 2^21313433000 is an apocalyptic number.

21313433000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21313433000 is an abundant number, since it is smaller than the sum of its proper divisors (30728466520).

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

21313433000 is a wasteful number, since it uses less digits than its factorization.

21313433000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926715 (or 926701 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21313433000 its reverse (33431312), we get a palindrome (21346864312).

The spelling of 21313433000 in words is "twenty-one billion, three hundred thirteen million, four hundred thirty-three thousand".