21452204160 has 128 divisors (see below), whose sum is σ = 75976617600. Its totient is φ = 5720583168.

The previous prime is 21452204159. The next prime is 21452204209. The reversal of 21452204160 is 6140225412.

21452204160 is a `hidden beast` number, since 2 + 1 + 452 + 204 + 1 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 603444 + ... + 638003.

It is an arithmetic number, because the mean of its divisors is an integer number (593567325).

Almost surely, 2^21452204160 is an apocalyptic number.

21452204160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21452204160 is an abundant number, since it is smaller than the sum of its proper divisors (54524413440).

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

21452204160 is a wasteful number, since it uses less digits than its factorization.

21452204160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241475 (or 1241457 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 21452204160 its reverse (6140225412), we get a palindrome (27592429572).

The spelling of 21452204160 in words is "twenty-one billion, four hundred fifty-two million, two hundred four thousand, one hundred sixty".