21143310429 has 4 divisors (see below), whose sum is σ = 28191080576. Its totient is φ = 14095540284.

The previous prime is 21143310413. The next prime is 21143310437. The reversal of 21143310429 is 92401334112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21143310429 - 2⁴ = 21143310413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21143310396 and 21143310405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143310469) 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, 3523885069 + ... + 3523885074.

It is an arithmetic number, because the mean of its divisors is an integer number (7047770144).

Almost surely, 2^21143310429 is an apocalyptic number.

It is an amenable number.

21143310429 is a deficient number, since it is larger than the sum of its proper divisors (7047770147).

21143310429 is an equidigital number, since it uses as much as digits as its factorization.

21143310429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7047770146.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 21143310429 in words is "twenty-one billion, one hundred forty-three million, three hundred ten thousand, four hundred twenty-nine".