21400133024 has 48 divisors (see below), whose sum is σ = 43679321280. Its totient is φ = 10313264640.

The previous prime is 21400133023. The next prime is 21400133039. The reversal of 21400133024 is 42033100412.

It is a junction number, because it is equal to n+sod(n) for n = 21400132987 and 21400133005.

It is not an unprimeable number, because it can be changed into a prime (21400133023) 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 7 ways as a sum of consecutive naturals, for example, 10637 + ... + 207155.

It is an arithmetic number, because the mean of its divisors is an integer number (909985860).

Almost surely, 2^21400133024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21400133024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21839660640).

21400133024 is an abundant number, since it is smaller than the sum of its proper divisors (22279188256).

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

21400133024 is a wasteful number, since it uses less digits than its factorization.

21400133024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196653 (or 196645 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21400133024 its reverse (42033100412), we get a palindrome (63433233436).

The spelling of 21400133024 in words is "twenty-one billion, four hundred million, one hundred thirty-three thousand, twenty-four".