21152346556460 has 96 divisors (see below), whose sum is σ = 50840077317120. Its totient is φ = 7241605924608.

The previous prime is 21152346556423. The next prime is 21152346556483. The reversal of 21152346556460 is 6465564325112.

It is a junction number, because it is equal to n+sod(n) for n = 21152346556399 and 21152346556408.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265830161 + ... + 265909719.

It is an arithmetic number, because the mean of its divisors is an integer number (529584138720).

Almost surely, 2^{21152346556460} is an apocalyptic number.

21152346556460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152346556460 is an abundant number, since it is smaller than the sum of its proper divisors (29687730760660).

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

21152346556460 is a wasteful number, since it uses less digits than its factorization.

21152346556460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82335 (or 82333 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 50.

The spelling of 21152346556460 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred forty-six million, five hundred fifty-six thousand, four hundred sixty".