21916115036 has 6 divisors (see below), whose sum is σ = 38353201320. Its totient is φ = 10958057516.

The previous prime is 21916115017. The next prime is 21916115047. The reversal of 21916115036 is 63051161912.

It is a junction number, because it is equal to n+sod(n) for n = 21916114987 and 21916115005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2739514376 + ... + 2739514383.

It is an arithmetic number, because the mean of its divisors is an integer number (6392200220).

Almost surely, 2^21916115036 is an apocalyptic number.

It is an amenable number.

21916115036 is a deficient number, since it is larger than the sum of its proper divisors (16437086284).

21916115036 is a wasteful number, since it uses less digits than its factorization.

21916115036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5479028763 (or 5479028761 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

Adding to 21916115036 its reverse (63051161912), we get a palindrome (84967276948).

The spelling of 21916115036 in words is "twenty-one billion, nine hundred sixteen million, one hundred fifteen thousand, thirty-six".