21541467120 has 80 divisors (see below), whose sum is σ = 67188354432. Its totient is φ = 5709139200.

The previous prime is 21541467109. The next prime is 21541467139. The reversal of 21541467120 is 2176414512.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236206 + ... + 314445.

Almost surely, 2^21541467120 is an apocalyptic number.

21541467120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21541467120 is an abundant number, since it is smaller than the sum of its proper divisors (45646887312).

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

21541467120 is a wasteful number, since it uses less digits than its factorization.

21541467120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550830 (or 550824 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 21541467120 in words is "twenty-one billion, five hundred forty-one million, four hundred sixty-seven thousand, one hundred twenty".