21793018644572 has 24 divisors (see below), whose sum is σ = 45481082390016. Its totient is φ = 8933784040368.

The previous prime is 21793018644557. The next prime is 21793018644577. The reversal of 21793018644572 is 27544681039712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21793018644577) 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, 16920044888 + ... + 16920046175.

It is an arithmetic number, because the mean of its divisors is an integer number (1895045099584).

It is a 2-persistent number, because it is pandigital, and so is 2⋅21793018644572 = 43586037289144, but 3⋅21793018644572 = 65379055933716 is not.

Almost surely, 2^{21793018644572} is an apocalyptic number.

It is an amenable number.

21793018644572 is an abundant number, since it is smaller than the sum of its proper divisors (23688063745444).

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

21793018644572 is a wasteful number, since it uses less digits than its factorization.

21793018644572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33840091097 (or 33840091095 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 21793018644572 in words is "twenty-one trillion, seven hundred ninety-three billion, eighteen million, six hundred forty-four thousand, five hundred seventy-two".