21102423332 has 24 divisors (see below), whose sum is σ = 38219982360. Its totient is φ = 10187735040.

The previous prime is 21102423299. The next prime is 21102423337. The reversal of 21102423332 is 23332420112.

It can be written as a sum of positive squares in 4 ways, for example, as 1397563456 + 19704859876 = 37384^2 + 140374^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21102423298 and 21102423307.

It is not an unprimeable number, because it can be changed into a prime (21102423337) 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, 647357 + ... + 679172.

It is an arithmetic number, because the mean of its divisors is an integer number (1592499265).

Almost surely, 2^21102423332 is an apocalyptic number.

It is an amenable number.

21102423332 is a deficient number, since it is larger than the sum of its proper divisors (17117559028).

21102423332 is a wasteful number, since it uses less digits than its factorization.

21102423332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326671 (or 1326669 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21102423332 its reverse (23332420112), we get a palindrome (44434843444).

The spelling of 21102423332 in words is "twenty-one billion, one hundred two million, four hundred twenty-three thousand, three hundred thirty-two".