21026233484 has 12 divisors (see below), whose sum is σ = 36907076808. Its totient is φ = 10481354400.

The previous prime is 21026233463. The next prime is 21026233493. The reversal of 21026233484 is 48433262012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7939097 + ... + 7941744.

It is an arithmetic number, because the mean of its divisors is an integer number (3075589734).

Almost surely, 2^21026233484 is an apocalyptic number.

It is an amenable number.

21026233484 is a deficient number, since it is larger than the sum of its proper divisors (15880843324).

21026233484 is a wasteful number, since it uses less digits than its factorization.

21026233484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15881176 (or 15881174 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 21026233484 its reverse (48433262012), we get a palindrome (69459495496).

The spelling of 21026233484 in words is "twenty-one billion, twenty-six million, two hundred thirty-three thousand, four hundred eighty-four".