21452055606 has 32 divisors (see below), whose sum is σ = 47677900800. Its totient is φ = 7149685320.

The previous prime is 21452055593. The next prime is 21452055643. The reversal of 21452055606 is 60655025412.

21452055606 is a `hidden beast` number, since 2 + 1 + 45 + 2 + 0 + 5 + 5 + 606 = 666.

It is a congruent number.

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, 431715 + ... + 478833.

It is an arithmetic number, because the mean of its divisors is an integer number (1489934400).

Almost surely, 2^21452055606 is an apocalyptic number.

21452055606 is an abundant number, since it is smaller than the sum of its proper divisors (26225845194).

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

21452055606 is a wasteful number, since it uses less digits than its factorization.

21452055606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55561 (or 55555 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 21452055606 in words is "twenty-one billion, four hundred fifty-two million, fifty-five thousand, six hundred six".