21023332430 has 16 divisors (see below), whose sum is σ = 37854304560. Its totient is φ = 8406598272.

The previous prime is 21023332423. The next prime is 21023332441. The reversal of 21023332430 is 3423332012.

It is a junction number, because it is equal to n+sod(n) for n = 21023332396 and 21023332405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309404 + ... + 371183.

It is an arithmetic number, because the mean of its divisors is an integer number (2365894035).

Almost surely, 2^21023332430 is an apocalyptic number.

21023332430 is a deficient number, since it is larger than the sum of its proper divisors (16830972130).

21023332430 is a wasteful number, since it uses less digits than its factorization.

21023332430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683683.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21023332430 its reverse (3423332012), we get a palindrome (24446664442).

The spelling of 21023332430 in words is "twenty-one billion, twenty-three million, three hundred thirty-two thousand, four hundred thirty".