21543332345142 has 32 divisors (see below), whose sum is σ = 44478805017600. Its totient is φ = 6949110809760.

The previous prime is 21543332345141. The next prime is 21543332345201. The reversal of 21543332345142 is 24154323334512.

It is a super-2 number, since 2×21543332345142² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21543332345094 and 21543332345103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21543332345141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775609 + ... + 6609707.

It is an arithmetic number, because the mean of its divisors is an integer number (1389962656800).

Almost surely, 2^{21543332345142} is an apocalyptic number.

21543332345142 is an abundant number, since it is smaller than the sum of its proper divisors (22935472672458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21543332345142 is a wasteful number, since it uses less digits than its factorization.

21543332345142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853988.

The product of its digits is 1036800, while the sum is 42.

Adding to 21543332345142 its reverse (24154323334512), we get a palindrome (45697655679654).

The spelling of 21543332345142 in words is "twenty-one trillion, five hundred forty-three billion, three hundred thirty-two million, three hundred forty-five thousand, one hundred forty-two".