21160229944 has 64 divisors (see below), whose sum is σ = 45738696960. Its totient is φ = 8989954560.

The previous prime is 21160229941. The next prime is 21160229983. The reversal of 21160229944 is 44992206112.

It is a junction number, because it is equal to n+sod(n) for n = 21160229897 and 21160229906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160229941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3060139 + ... + 3067045.

It is an arithmetic number, because the mean of its divisors is an integer number (714667140).

Almost surely, 2^21160229944 is an apocalyptic number.

It is an amenable number.

21160229944 is an abundant number, since it is smaller than the sum of its proper divisors (24578467016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21160229944 is a wasteful number, since it uses less digits than its factorization.

21160229944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7388 (or 7384 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 21160229944 in words is "twenty-one billion, one hundred sixty million, two hundred twenty-nine thousand, nine hundred forty-four".