21114287742 has 32 divisors (see below), whose sum is σ = 44733600000. Its totient is φ = 6620980608.

The previous prime is 21114287731. The next prime is 21114287743. The reversal of 21114287742 is 24778241112.

It is a self number, because there is not a number n which added to its sum of digits gives 21114287742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114287743) 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 15 ways as a sum of consecutive naturals, for example, 174759 + ... + 269757.

It is an arithmetic number, because the mean of its divisors is an integer number (1397925000).

Almost surely, 2^21114287742 is an apocalyptic number.

21114287742 is an abundant number, since it is smaller than the sum of its proper divisors (23619312258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21114287742 is a wasteful number, since it uses less digits than its factorization.

21114287742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97200.

The product of its digits is 50176, while the sum is 39.

The spelling of 21114287742 in words is "twenty-one billion, one hundred fourteen million, two hundred eighty-seven thousand, seven hundred forty-two".