21542341106 has 48 divisors (see below), whose sum is σ = 38549919168. Its totient is φ = 8949096000.

The previous prime is 21542341057. The next prime is 21542341133. The reversal of 21542341106 is 60114324512.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346835 + ... + 404201.

It is an arithmetic number, because the mean of its divisors is an integer number (803123316).

Almost surely, 2^21542341106 is an apocalyptic number.

21542341106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21542341106 is a deficient number, since it is larger than the sum of its proper divisors (17007578062).

21542341106 is a wasteful number, since it uses less digits than its factorization.

21542341106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57507 (or 57494 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 21542341106 its reverse (60114324512), we get a palindrome (81656665618).

The spelling of 21542341106 in words is "twenty-one billion, five hundred forty-two million, three hundred forty-one thousand, one hundred six".