21400302242 has 24 divisors (see below), whose sum is σ = 35331252096. Its totient is φ = 9714375000.

The previous prime is 21400302241. The next prime is 21400302257. The reversal of 21400302242 is 24220300412.

It is not an unprimeable number, because it can be changed into a prime (21400302241) 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 11 ways as a sum of consecutive naturals, for example, 122867 + ... + 240617.

It is an arithmetic number, because the mean of its divisors is an integer number (1472135504).

Almost surely, 2^21400302242 is an apocalyptic number.

21400302242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21400302242 is a deficient number, since it is larger than the sum of its proper divisors (13930949854).

21400302242 is a wasteful number, since it uses less digits than its factorization.

21400302242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118526 (or 118515 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21400302242 its reverse (24220300412), we get a palindrome (45620602654).

The spelling of 21400302242 in words is "twenty-one billion, four hundred million, three hundred two thousand, two hundred forty-two".