21344152541 has 8 divisors (see below), whose sum is σ = 21423827040. Its totient is φ = 21264525072.

The previous prime is 21344152537. The next prime is 21344152561. The reversal of 21344152541 is 14525144312.

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

It is a cyclic number.

It is not a de Polignac number, because 21344152541 - 2² = 21344152537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21344152498 and 21344152507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344152561) 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, 1085786 + ... + 1105268.

It is an arithmetic number, because the mean of its divisors is an integer number (2677978380).

Almost surely, 2^21344152541 is an apocalyptic number.

It is an amenable number.

21344152541 is a deficient number, since it is larger than the sum of its proper divisors (79674499).

21344152541 is a wasteful number, since it uses less digits than its factorization.

21344152541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23515.

The product of its digits is 19200, while the sum is 32.

Adding to 21344152541 its reverse (14525144312), we get a palindrome (35869296853).

The spelling of 21344152541 in words is "twenty-one billion, three hundred forty-four million, one hundred fifty-two thousand, five hundred forty-one".