21523488486 has 32 divisors (see below), whose sum is σ = 46005148800. Its totient is φ = 6689356416.

The previous prime is 21523488479. The next prime is 21523488487. The reversal of 21523488486 is 68488432512.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523488487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 975136 + ... + 996963.

It is an arithmetic number, because the mean of its divisors is an integer number (1437660900).

Almost surely, 2^21523488486 is an apocalyptic number.

21523488486 is an abundant number, since it is smaller than the sum of its proper divisors (24481660314).

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

21523488486 is a wasteful number, since it uses less digits than its factorization.

21523488486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972228.

The product of its digits is 2949120, while the sum is 51.

The spelling of 21523488486 in words is "twenty-one billion, five hundred twenty-three million, four hundred eighty-eight thousand, four hundred eighty-six".