21359488560 has 80 divisors (see below), whose sum is σ = 68350387200. Its totient is φ = 5512124160.

The previous prime is 21359488547. The next prime is 21359488583. The reversal of 21359488560 is 6588495312.

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

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, 1428010 + ... + 1442889.

It is an arithmetic number, because the mean of its divisors is an integer number (854379840).

Almost surely, 2^21359488560 is an apocalyptic number.

21359488560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21359488560 is an abundant number, since it is smaller than the sum of its proper divisors (46990898640).

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

21359488560 is a wasteful number, since it uses less digits than its factorization.

21359488560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870946 (or 2870940 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 21359488560 in words is "twenty-one billion, three hundred fifty-nine million, four hundred eighty-eight thousand, five hundred sixty".