21141414431 has 4 divisors (see below), whose sum is σ = 21141951792. Its totient is φ = 21140877072.

The previous prime is 21141414409. The next prime is 21141414451. The reversal of 21141414431 is 13441414112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21141414431 - 2¹⁰ = 21141413407 is a prime.

It is a super-2 number, since 2×21141414431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21141414431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141414451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204566 + ... + 290051.

It is an arithmetic number, because the mean of its divisors is an integer number (5285487948).

Almost surely, 2^21141414431 is an apocalyptic number.

21141414431 is a deficient number, since it is larger than the sum of its proper divisors (537361).

21141414431 is an equidigital number, since it uses as much as digits as its factorization.

21141414431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537360.

The product of its digits is 1536, while the sum is 26.

Adding to 21141414431 its reverse (13441414112), we get a palindrome (34582828543).

The spelling of 21141414431 in words is "twenty-one billion, one hundred forty-one million, four hundred fourteen thousand, four hundred thirty-one".