21333423010 has 16 divisors (see below), whose sum is σ = 38780362872. Its totient is φ = 8448880000.

The previous prime is 21333422989. The next prime is 21333423011. The reversal of 21333423010 is 1032433312.

It can be written as a sum of positive squares in 4 ways, for example, as 19371907489 + 1961515521 = 139183^2 + 44289^2 .

It is a super-2 number, since 2×21333423010² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21333423011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10560091 + ... + 10562110.

Almost surely, 2^21333423010 is an apocalyptic number.

21333423010 is a deficient number, since it is larger than the sum of its proper divisors (17446939862).

21333423010 is a wasteful number, since it uses less digits than its factorization.

21333423010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21122309.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21333423010 its reverse (1032433312), we get a palindrome (22365856322).

The spelling of 21333423010 in words is "twenty-one billion, three hundred thirty-three million, four hundred twenty-three thousand, ten".