21232579498 has 8 divisors (see below), whose sum is σ = 34298782308. Its totient is φ = 9799652064.

The previous prime is 21232579493. The next prime is 21232579531. The reversal of 21232579498 is 89497523212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21214796409 + 17783089 = 145653^2 + 4217^2 .

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

It is a super-3 number, since 3×21232579498³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21232579493) 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, 408318811 + ... + 408318862.

Almost surely, 2^21232579498 is an apocalyptic number.

21232579498 is a deficient number, since it is larger than the sum of its proper divisors (13066202810).

21232579498 is a wasteful number, since it uses less digits than its factorization.

21232579498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816637688.

The product of its digits is 2177280, while the sum is 52.

The spelling of 21232579498 in words is "twenty-one billion, two hundred thirty-two million, five hundred seventy-nine thousand, four hundred ninety-eight".