21542103267 has 8 divisors (see below), whose sum is σ = 29649346560. Its totient is φ = 13898131080.

The previous prime is 21542103227. The next prime is 21542103311. The reversal of 21542103267 is 76230124512.

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

It is not a de Polignac number, because 21542103267 - 2⁶ = 21542103203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21542103227) 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, 115817667 + ... + 115817852.

It is an arithmetic number, because the mean of its divisors is an integer number (3706168320).

Almost surely, 2^21542103267 is an apocalyptic number.

21542103267 is a deficient number, since it is larger than the sum of its proper divisors (8107243293).

21542103267 is a wasteful number, since it uses less digits than its factorization.

21542103267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231635553.

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 21542103267 its reverse (76230124512), we get a palindrome (97772227779).

The spelling of 21542103267 in words is "twenty-one billion, five hundred forty-two million, one hundred three thousand, two hundred sixty-seven".