21070970008 has 96 divisors (see below), whose sum is σ = 46500577200. Its totient is φ = 8912414720.

The previous prime is 21070969943. The next prime is 21070970023. The reversal of 21070970008 is 80007907012.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1457391 + ... + 1471777.

Almost surely, 2^21070970008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21070970008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23250288600).

21070970008 is an abundant number, since it is smaller than the sum of its proper divisors (25429607192).

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

21070970008 is a wasteful number, since it uses less digits than its factorization.

21070970008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14521 (or 14506 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 21070970008 in words is "twenty-one billion, seventy million, nine hundred seventy thousand, eight".