21330104070 has 128 divisors (see below), whose sum is σ = 57976611840. Its totient is φ = 4974932480.

The previous prime is 21330104009. The next prime is 21330104077. The reversal of 21330104070 is 7040103312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330104077) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2800207 + ... + 2807813.

It is an arithmetic number, because the mean of its divisors is an integer number (452942280).

Almost surely, 2^21330104070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21330104070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28988305920).

21330104070 is an abundant number, since it is smaller than the sum of its proper divisors (36646507770).

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

21330104070 is a wasteful number, since it uses less digits than its factorization.

21330104070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7950.

The product of its (nonzero) digits is 504, while the sum is 21.

Adding to 21330104070 its reverse (7040103312), we get a palindrome (28370207382).

The spelling of 21330104070 in words is "twenty-one billion, three hundred thirty million, one hundred four thousand, seventy".