21130044104 has 64 divisors (see below), whose sum is σ = 42909834240. Its totient is φ = 9696879360.

The previous prime is 21130044097. The next prime is 21130044139. The reversal of 21130044104 is 40144003112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24483977 + ... + 24484839.

It is an arithmetic number, because the mean of its divisors is an integer number (670466160).

Almost surely, 2^21130044104 is an apocalyptic number.

It is an amenable number.

21130044104 is an abundant number, since it is smaller than the sum of its proper divisors (21779790136).

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

21130044104 is a wasteful number, since it uses less digits than its factorization.

21130044104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950 (or 1946 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21130044104 its reverse (40144003112), we get a palindrome (61274047216).

The spelling of 21130044104 in words is "twenty-one billion, one hundred thirty million, forty-four thousand, one hundred four".