21162315044 has 48 divisors (see below), whose sum is σ = 41192288256. Its totient is φ = 9446889600.

The previous prime is 21162314993. The next prime is 21162315047. The reversal of 21162315044 is 44051326112.

It is a junction number, because it is equal to n+sod(n) for n = 21162314998 and 21162315016.

It is not an unprimeable number, because it can be changed into a prime (21162315047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5125709 + ... + 5129835.

It is an arithmetic number, because the mean of its divisors is an integer number (858172672).

Almost surely, 2^21162315044 is an apocalyptic number.

It is an amenable number.

21162315044 is a deficient number, since it is larger than the sum of its proper divisors (20029973212).

21162315044 is a wasteful number, since it uses less digits than its factorization.

21162315044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7356 (or 7354 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 21162315044 in words is "twenty-one billion, one hundred sixty-two million, three hundred fifteen thousand, forty-four".