21576084494 has 8 divisors (see below), whose sum is σ = 32819959728. Its totient is φ = 10636097920.

The previous prime is 21576084487. The next prime is 21576084521. The reversal of 21576084494 is 49448067512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75971987 + ... + 75972270.

It is an arithmetic number, because the mean of its divisors is an integer number (4102494966).

Almost surely, 2^21576084494 is an apocalyptic number.

21576084494 is a deficient number, since it is larger than the sum of its proper divisors (11243875234).

21576084494 is a wasteful number, since it uses less digits than its factorization.

21576084494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151944330.

The product of its (nonzero) digits is 1935360, while the sum is 50.

Adding to 21576084494 its sum of digits (50), we get a square (21576084544 = 146888²).

The spelling of 21576084494 in words is "twenty-one billion, five hundred seventy-six million, eighty-four thousand, four hundred ninety-four".