21023133330 has 32 divisors (see below), whose sum is σ = 51282664128. Its totient is φ = 5514264000.

The previous prime is 21023133293. The next prime is 21023133353. The reversal of 21023133330 is 3333132012.

It is a junction number, because it is equal to n+sod(n) for n = 21023133297 and 21023133306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5742196 + ... + 5745855.

It is an arithmetic number, because the mean of its divisors is an integer number (1602583254).

Almost surely, 2^21023133330 is an apocalyptic number.

21023133330 is an abundant number, since it is smaller than the sum of its proper divisors (30259530798).

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

21023133330 is a wasteful number, since it uses less digits than its factorization.

21023133330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11488122.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21023133330 its reverse (3333132012), we get a palindrome (24356265342).

The spelling of 21023133330 in words is "twenty-one billion, twenty-three million, one hundred thirty-three thousand, three hundred thirty".