21083361000 has 128 divisors (see below), whose sum is σ = 70840224000. Its totient is φ = 5189740800.

The previous prime is 21083360993. The next prime is 21083361007. The reversal of 21083361000 is 16338012.

It is an interprime number because it is at equal distance from previous prime (21083360993) and next prime (21083361007).

It is a super-2 number, since 2×21083361000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21083361007) 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 31 ways as a sum of consecutive naturals, for example, 231300 + ... + 309299.

It is an arithmetic number, because the mean of its divisors is an integer number (553439250).

Almost surely, 2^21083361000 is an apocalyptic number.

21083361000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21083361000 is an abundant number, since it is smaller than the sum of its proper divisors (49756863000).

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

21083361000 is a wasteful number, since it uses less digits than its factorization.

21083361000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540636 (or 540622 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21083361000 its reverse (16338012), we get a palindrome (21099699012).

The spelling of 21083361000 in words is "twenty-one billion, eighty-three million, three hundred sixty-one thousand".