21152165036460 has 48 divisors (see below), whose sum is σ = 59226802048512. Its totient is φ = 5640506872000.

The previous prime is 21152165036447. The next prime is 21152165036467. The reversal of 21152165036460 is 6463056125112.

It is not an unprimeable number, because it can be changed into a prime (21152165036467) 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, 2731615 + ... + 7054505.

It is an arithmetic number, because the mean of its divisors is an integer number (1233891709344).

Almost surely, 2^{21152165036460} is an apocalyptic number.

21152165036460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152165036460 is an abundant number, since it is smaller than the sum of its proper divisors (38074637012052).

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

21152165036460 is a wasteful number, since it uses less digits than its factorization.

21152165036460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4404454 (or 4404452 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 21152165036460 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred sixty-five million, thirty-six thousand, four hundred sixty".