21603224140752 has 80 divisors (see below), whose sum is σ = 57170665218240. Its totient is φ = 7025296512000.

The previous prime is 21603224140721. The next prime is 21603224140753. The reversal of 21603224140752 is 25704142230612.

It is a self number, because there is not a number n which added to its sum of digits gives 21603224140752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603224140753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145756699 + ... + 145904837.

It is an arithmetic number, because the mean of its divisors is an integer number (714633315228).

Almost surely, 2^{21603224140752} is an apocalyptic number.

It is an amenable number.

21603224140752 is an abundant number, since it is smaller than the sum of its proper divisors (35567441077488).

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

21603224140752 is a wasteful number, since it uses less digits than its factorization.

21603224140752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222292 (or 222286 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 21603224140752 in words is "twenty-one trillion, six hundred three billion, two hundred twenty-four million, one hundred forty thousand, seven hundred fifty-two".