21620005300 has 36 divisors (see below), whose sum is σ = 47037989376. Its totient is φ = 8625407200.

The previous prime is 21620005291. The next prime is 21620005301. The reversal of 21620005300 is 350002612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21620005301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243946 + ... + 320545.

It is an arithmetic number, because the mean of its divisors is an integer number (1306610816).

Almost surely, 2^21620005300 is an apocalyptic number.

21620005300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21620005300 is an abundant number, since it is smaller than the sum of its proper divisors (25417984076).

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

21620005300 is a wasteful number, since it uses less digits than its factorization.

21620005300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564888 (or 564881 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 21620005300 its reverse (350002612), we get a palindrome (21970007912).

The spelling of 21620005300 in words is "twenty-one billion, six hundred twenty million, five thousand, three hundred".