21153133032 has 16 divisors (see below), whose sum is σ = 52882832640. Its totient is φ = 7051044336.

The previous prime is 21153133019. The next prime is 21153133039. The reversal of 21153133032 is 23033135112.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 881380543 = 21153133032 / (2 + 1 + 1 + 5 + 3 + 1 + 3 + 3 + 0 + 3 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21153132993 and 21153133011.

It is not an unprimeable number, because it can be changed into a prime (21153133039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440690248 + ... + 440690295.

It is an arithmetic number, because the mean of its divisors is an integer number (3305177040).

Almost surely, 2^21153133032 is an apocalyptic number.

It is an amenable number.

21153133032 is an abundant number, since it is smaller than the sum of its proper divisors (31729699608).

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

21153133032 is a wasteful number, since it uses less digits than its factorization.

21153133032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881380552 (or 881380548 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

Adding to 21153133032 its reverse (23033135112), we get a palindrome (44186268144).

The spelling of 21153133032 in words is "twenty-one billion, one hundred fifty-three million, one hundred thirty-three thousand, thirty-two".