21534342141 has 8 divisors (see below), whose sum is σ = 30921106720. Its totient is φ = 13251902832.

The previous prime is 21534342047. The next prime is 21534342143. The reversal of 21534342141 is 14124343512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21534342141 - 2⁷ = 21534342013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21534342099 and 21534342108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534342143) 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, 276081271 + ... + 276081348.

It is an arithmetic number, because the mean of its divisors is an integer number (3865138340).

Almost surely, 2^21534342141 is an apocalyptic number.

It is an amenable number.

21534342141 is a deficient number, since it is larger than the sum of its proper divisors (9386764579).

21534342141 is a wasteful number, since it uses less digits than its factorization.

21534342141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552162635.

The product of its digits is 11520, while the sum is 30.

Adding to 21534342141 its reverse (14124343512), we get a palindrome (35658685653).

The spelling of 21534342141 in words is "twenty-one billion, five hundred thirty-four million, three hundred forty-two thousand, one hundred forty-one".