21603272252202 has 40 divisors (see below), whose sum is σ = 49587998924772. Its totient is φ = 7025454388800.

The previous prime is 21603272252143. The next prime is 21603272252279. The reversal of 21603272252202 is 20225227230612.

21603272252202 is a `hidden beast` number, since 2 + 1 + 60 + 3 + 2 + 72 + 2 + 522 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14747834964681 + 6855437287521 = 3840291^2 + 2618289^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1626255949 + ... + 1626269232.

Almost surely, 2^{21603272252202} is an apocalyptic number.

21603272252202 is an abundant number, since it is smaller than the sum of its proper divisors (27984726672570).

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

21603272252202 is a wasteful number, since it uses less digits than its factorization.

21603272252202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252525236 (or 3252525227 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

Adding to 21603272252202 its reverse (20225227230612), we get a palindrome (41828499482814).

The spelling of 21603272252202 in words is "twenty-one trillion, six hundred three billion, two hundred seventy-two million, two hundred fifty-two thousand, two hundred two".