21485693088 has 72 divisors (see below), whose sum is σ = 64315742400. Its totient is φ = 6784953984.

The previous prime is 21485693081. The next prime is 21485693111. The reversal of 21485693088 is 88039658412.

21485693088 is a `hidden beast` number, since 2 + 1 + 48 + 569 + 30 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (21485693081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1957768 + ... + 1968711.

It is an arithmetic number, because the mean of its divisors is an integer number (893274200).

Almost surely, 2^21485693088 is an apocalyptic number.

It is an amenable number.

21485693088 is an abundant number, since it is smaller than the sum of its proper divisors (42830049312).

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

21485693088 is a wasteful number, since it uses less digits than its factorization.

21485693088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926514 (or 3926503 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 21485693088 in words is "twenty-one billion, four hundred eighty-five million, six hundred ninety-three thousand, eighty-eight".