21290793006 has 64 divisors (see below), whose sum is σ = 50287154688. Its totient is φ = 5882295168.

The previous prime is 21290793001. The next prime is 21290793037. The reversal of 21290793006 is 60039709212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21290793001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211276 + ... + 295328.

It is an arithmetic number, because the mean of its divisors is an integer number (785736792).

Almost surely, 2^21290793006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21290793006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25143577344).

21290793006 is an abundant number, since it is smaller than the sum of its proper divisors (28996361682).

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

21290793006 is a wasteful number, since it uses less digits than its factorization.

21290793006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84265.

The product of its (nonzero) digits is 40824, while the sum is 39.

The spelling of 21290793006 in words is "twenty-one billion, two hundred ninety million, seven hundred ninety-three thousand, six".