21486239320 has 192 divisors, whose sum is σ = 60831540000. Its totient is φ = 6769889280.

The previous prime is 21486239317. The next prime is 21486239321. The reversal of 21486239320 is 2393268412.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21486239321) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 6138931 + ... + 6142429.

Almost surely, 2^21486239320 is an apocalyptic number.

21486239320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21486239320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30415770000).

21486239320 is an abundant number, since it is smaller than the sum of its proper divisors (39345300680).

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

21486239320 is a wasteful number, since it uses less digits than its factorization.

21486239320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778 (or 3767 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 21486239320 in words is "twenty-one billion, four hundred eighty-six million, two hundred thirty-nine thousand, three hundred twenty".