21415041154 has 16 divisors (see below), whose sum is σ = 34596600192. Its totient is φ = 9882987408.

The previous prime is 21415041143. The next prime is 21415041161. The reversal of 21415041154 is 45114051412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331857 + ... + 391099.

It is an arithmetic number, because the mean of its divisors is an integer number (2162287512).

Almost surely, 2^21415041154 is an apocalyptic number.

21415041154 is a deficient number, since it is larger than the sum of its proper divisors (13181559038).

21415041154 is a wasteful number, since it uses less digits than its factorization.

21415041154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73161.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 21415041154 its reverse (45114051412), we get a palindrome (66529092566).

The spelling of 21415041154 in words is "twenty-one billion, four hundred fifteen million, forty-one thousand, one hundred fifty-four".