21495794432160 has 96 divisors (see below), whose sum is σ = 70655741735040. Its totient is φ = 5482985243648.

The previous prime is 21495794432159. The next prime is 21495794432197. The reversal of 21495794432160 is 6123449759412.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 21495794432160.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973530375 + ... + 973552454.

It is an arithmetic number, because the mean of its divisors is an integer number (735997309740).

Almost surely, 2^{21495794432160} is an apocalyptic number.

21495794432160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21495794432160 is an abundant number, since it is smaller than the sum of its proper divisors (49159947302880).

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

21495794432160 is a wasteful number, since it uses less digits than its factorization.

21495794432160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947082870 (or 1947082862 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 21495794432160 in words is "twenty-one trillion, four hundred ninety-five billion, seven hundred ninety-four million, four hundred thirty-two thousand, one hundred sixty".