21024237116 has 12 divisors (see below), whose sum is σ = 36793747200. Its totient is φ = 10511737920.

The previous prime is 21024237109. The next prime is 21024237133. The reversal of 21024237116 is 61173242012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55685 + ... + 212483.

It is an arithmetic number, because the mean of its divisors is an integer number (3066145600).

Almost surely, 2^21024237116 is an apocalyptic number.

It is an amenable number.

21024237116 is a deficient number, since it is larger than the sum of its proper divisors (15769510084).

21024237116 is a wasteful number, since it uses less digits than its factorization.

21024237116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190324 (or 190322 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 21024237116 its reverse (61173242012), we get a palindrome (82197479128).

The spelling of 21024237116 in words is "twenty-one billion, twenty-four million, two hundred thirty-seven thousand, one hundred sixteen".