21583066794 has 16 divisors (see below), whose sum is σ = 43216512768. Its totient is φ = 7185959072.

The previous prime is 21583066793. The next prime is 21583066837. The reversal of 21583066794 is 49766038512.

It is not an unprimeable number, because it can be changed into a prime (21583066793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2093562 + ... + 2103845.

It is an arithmetic number, because the mean of its divisors is an integer number (2701032048).

It is a 1-persistent number, because it is pandigital, but 2⋅21583066794 = 43166133588 is not.

Almost surely, 2^21583066794 is an apocalyptic number.

21583066794 is an abundant number, since it is smaller than the sum of its proper divisors (21633445974).

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

21583066794 is a wasteful number, since it uses less digits than its factorization.

21583066794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198269.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 21583066794 in words is "twenty-one billion, five hundred eighty-three million, sixty-six thousand, seven hundred ninety-four".