21434023141 has 4 divisors (see below), whose sum is σ = 21541732000. Its totient is φ = 21326314284.

The previous prime is 21434023133. The next prime is 21434023159. The reversal of 21434023141 is 14132043412.

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 a cyclic number.

It is not a de Polignac number, because 21434023141 - 2³ = 21434023133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434020141) 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, 53854131 + ... + 53854528.

It is an arithmetic number, because the mean of its divisors is an integer number (5385433000).

Almost surely, 2^21434023141 is an apocalyptic number.

It is an amenable number.

21434023141 is a deficient number, since it is larger than the sum of its proper divisors (107708859).

21434023141 is a wasteful number, since it uses less digits than its factorization.

21434023141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107708858.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21434023141 its reverse (14132043412), we get a palindrome (35566066553).

The spelling of 21434023141 in words is "twenty-one billion, four hundred thirty-four million, twenty-three thousand, one hundred forty-one".