21794084536 has 16 divisors (see below), whose sum is σ = 46701609840. Its totient is φ = 9340321920.

The previous prime is 21794084509. The next prime is 21794084537. The reversal of 21794084536 is 63548049712.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21794084536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21794084537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194589985 + ... + 194590096.

It is an arithmetic number, because the mean of its divisors is an integer number (2918850615).

It is a 2-persistent number, because it is pandigital, and so is 2⋅21794084536 = 43588169072, but 3⋅21794084536 = 65382253608 is not.

Almost surely, 2^21794084536 is an apocalyptic number.

It is an amenable number.

21794084536 is an abundant number, since it is smaller than the sum of its proper divisors (24907525304).

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

21794084536 is a wasteful number, since it uses less digits than its factorization.

21794084536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389180094 (or 389180090 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 21794084536 in words is "twenty-one billion, seven hundred ninety-four million, eighty-four thousand, five hundred thirty-six".