21023133032 has 96 divisors (see below), whose sum is σ = 44100352800. Its totient is φ = 9316944000.

The previous prime is 21023133029. The next prime is 21023133083. The reversal of 21023133032 is 23033132012.

It is a junction number, because it is equal to n+sod(n) for n = 21023132995 and 21023133013.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55469819 + ... + 55470197.

It is an arithmetic number, because the mean of its divisors is an integer number (459378675).

Almost surely, 2^21023133032 is an apocalyptic number.

21023133032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21023133032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22050176400).

21023133032 is an abundant number, since it is smaller than the sum of its proper divisors (23077219768).

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

21023133032 is a wasteful number, since it uses less digits than its factorization.

21023133032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 572 counting only the distinct ones).

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

Adding to 21023133032 its reverse (23033132012), we get a palindrome (44056265044).

The spelling of 21023133032 in words is "twenty-one billion, twenty-three million, one hundred thirty-three thousand, thirty-two".