21131411430 has 32 divisors (see below), whose sum is σ = 50721076224. Its totient is φ = 5634410976.

The previous prime is 21131411419. The next prime is 21131411471. The reversal of 21131411430 is 3411413112.

It is a junction number, because it is equal to n+sod(n) for n = 21131411397 and 21131411406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272907 + ... + 341673.

It is an arithmetic number, because the mean of its divisors is an integer number (1585033632).

Almost surely, 2^21131411430 is an apocalyptic number.

21131411430 is an abundant number, since it is smaller than the sum of its proper divisors (29589664794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21131411430 is a wasteful number, since it uses less digits than its factorization.

21131411430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79020.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21131411430 its reverse (3411413112), we get a palindrome (24542824542).

The spelling of 21131411430 in words is "twenty-one billion, one hundred thirty-one million, four hundred eleven thousand, four hundred thirty".