21311010430 has 16 divisors (see below), whose sum is σ = 38404594800. Its totient is φ = 8514453952.

The previous prime is 21311010401. The next prime is 21311010437. The reversal of 21311010430 is 3401011312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311010437) 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, 1234780 + ... + 1251919.

It is an arithmetic number, because the mean of its divisors is an integer number (2400287175).

Almost surely, 2^21311010430 is an apocalyptic number.

21311010430 is a deficient number, since it is larger than the sum of its proper divisors (17093584370).

21311010430 is a wasteful number, since it uses less digits than its factorization.

21311010430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487563.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21311010430 its reverse (3401011312), we get a palindrome (24712021742).

The spelling of 21311010430 in words is "twenty-one billion, three hundred eleven million, ten thousand, four hundred thirty".