21013116682 has 16 divisors (see below), whose sum is σ = 31751016192. Its totient is φ = 10429614000.

The previous prime is 21013116653. The next prime is 21013116689. The reversal of 21013116682 is 28661131012.

It is not an unprimeable number, because it can be changed into a prime (21013116689) 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, 208948 + ... + 292720.

It is an arithmetic number, because the mean of its divisors is an integer number (1984438512).

Almost surely, 2^21013116682 is an apocalyptic number.

21013116682 is a deficient number, since it is larger than the sum of its proper divisors (10737899510).

21013116682 is a wasteful number, since it uses less digits than its factorization.

21013116682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84693.

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 21013116682 its reverse (28661131012), we get a palindrome (49674247694).

The spelling of 21013116682 in words is "twenty-one billion, thirteen million, one hundred sixteen thousand, six hundred eighty-two".