21023041430 has 16 divisors (see below), whose sum is σ = 37843125264. Its totient is φ = 8408849760.

The previous prime is 21023041411. The next prime is 21023041439. The reversal of 21023041430 is 3414032012.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023041439) 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, 432245 + ... + 478415.

It is an arithmetic number, because the mean of its divisors is an integer number (2365195329).

Almost surely, 2^21023041430 is an apocalyptic number.

21023041430 is a deficient number, since it is larger than the sum of its proper divisors (16820083834).

21023041430 is a wasteful number, since it uses less digits than its factorization.

21023041430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91711.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21023041430 its reverse (3414032012), we get a palindrome (24437073442).

The spelling of 21023041430 in words is "twenty-one billion, twenty-three million, forty-one thousand, four hundred thirty".