21243240614 has 16 divisors (see below), whose sum is σ = 32371460352. Its totient is φ = 10453727688.

The previous prime is 21243240607. The next prime is 21243240617. The reversal of 21243240614 is 41604234212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21243240617) 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, 199634 + ... + 286949.

It is an arithmetic number, because the mean of its divisors is an integer number (2023216272).

Almost surely, 2^21243240614 is an apocalyptic number.

21243240614 is a deficient number, since it is larger than the sum of its proper divisors (11128219738).

21243240614 is a wasteful number, since it uses less digits than its factorization.

21243240614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486931.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21243240614 its reverse (41604234212), we get a palindrome (62847474826).

The spelling of 21243240614 in words is "twenty-one billion, two hundred forty-three million, two hundred forty thousand, six hundred fourteen".