21603272273652 has 24 divisors (see below), whose sum is σ = 50418634262976. Its totient is φ = 7199519478208.

The previous prime is 21603272273623. The next prime is 21603272273659. The reversal of 21603272273652 is 25637227230612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603272273659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196352673 + ... + 196462664.

It is an arithmetic number, because the mean of its divisors is an integer number (2100776427624).

Almost surely, 2^{21603272273652} is an apocalyptic number.

It is an amenable number.

21603272273652 is an abundant number, since it is smaller than the sum of its proper divisors (28815361989324).

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

21603272273652 is a wasteful number, since it uses less digits than its factorization.

21603272273652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392819927 (or 392819925 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 48.

The spelling of 21603272273652 in words is "twenty-one trillion, six hundred three billion, two hundred seventy-two million, two hundred seventy-three thousand, six hundred fifty-two".