21574854480 has 80 divisors (see below), whose sum is σ = 67130881920. Its totient is φ = 5731889664.

The previous prime is 21574854463. The next prime is 21574854487. The reversal of 21574854480 is 8445847512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21574854487) 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, 102532 + ... + 231651.

It is an arithmetic number, because the mean of its divisors is an integer number (839136024).

Almost surely, 2^21574854480 is an apocalyptic number.

21574854480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21574854480 is an abundant number, since it is smaller than the sum of its proper divisors (45556027440).

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

21574854480 is a wasteful number, since it uses less digits than its factorization.

21574854480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334468 (or 334462 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 48.

The spelling of 21574854480 in words is "twenty-one billion, five hundred seventy-four million, eight hundred fifty-four thousand, four hundred eighty".