21112403677 has 8 divisors (see below), whose sum is σ = 21178828800. Its totient is φ = 21046016640.

The previous prime is 21112403623. The next prime is 21112403723. The reversal of 21112403677 is 77630421112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112403677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112403077) 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, 1439652 + ... + 1454242.

It is an arithmetic number, because the mean of its divisors is an integer number (2647353600).

Almost surely, 2^21112403677 is an apocalyptic number.

It is an amenable number.

21112403677 is a deficient number, since it is larger than the sum of its proper divisors (66425123).

21112403677 is a wasteful number, since it uses less digits than its factorization.

21112403677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19043.

The product of its (nonzero) digits is 14112, while the sum is 34.

Adding to 21112403677 its reverse (77630421112), we get a palindrome (98742824789).

The spelling of 21112403677 in words is "twenty-one billion, one hundred twelve million, four hundred three thousand, six hundred seventy-seven".