21425576494 has 8 divisors (see below), whose sum is σ = 36729559728. Its totient is φ = 9182389920.

The previous prime is 21425576483. The next prime is 21425576581. The reversal of 21425576494 is 49467552412.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765199147 + ... + 765199174.

It is an arithmetic number, because the mean of its divisors is an integer number (4591194966).

Almost surely, 2^21425576494 is an apocalyptic number.

21425576494 is a deficient number, since it is larger than the sum of its proper divisors (15303983234).

21425576494 is a wasteful number, since it uses less digits than its factorization.

21425576494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530398330.

The product of its digits is 2419200, while the sum is 49.

The spelling of 21425576494 in words is "twenty-one billion, four hundred twenty-five million, five hundred seventy-six thousand, four hundred ninety-four".