21466225580 has 24 divisors (see below), whose sum is σ = 45103374960. Its totient is φ = 8581861440.

The previous prime is 21466225579. The next prime is 21466225589. The reversal of 21466225580 is 8552266412.

It is not an unprimeable number, because it can be changed into a prime (21466225589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251150 + ... + 325589.

It is an arithmetic number, because the mean of its divisors is an integer number (1879307290).

Almost surely, 2^21466225580 is an apocalyptic number.

21466225580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21466225580 is an abundant number, since it is smaller than the sum of its proper divisors (23637149380).

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

21466225580 is a wasteful number, since it uses less digits than its factorization.

21466225580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578609 (or 578607 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 21466225580 in words is "twenty-one billion, four hundred sixty-six million, two hundred twenty-five thousand, five hundred eighty".