21154288414 has 16 divisors (see below), whose sum is σ = 37148995296. Its totient is φ = 8844998400.

The previous prime is 21154288403. The next prime is 21154288417. The reversal of 21154288414 is 41488245112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21154288417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18426507 + ... + 18427654.

It is an arithmetic number, because the mean of its divisors is an integer number (2321812206).

Almost surely, 2^21154288414 is an apocalyptic number.

21154288414 is a deficient number, since it is larger than the sum of its proper divisors (15994706882).

21154288414 is a wasteful number, since it uses less digits than its factorization.

21154288414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36854211.

The product of its digits is 81920, while the sum is 40.

The spelling of 21154288414 in words is "twenty-one billion, one hundred fifty-four million, two hundred eighty-eight thousand, four hundred fourteen".