21603271470725 has 48 divisors (see below), whose sum is σ = 30856989216768. Its totient is φ = 14696672970240.

The previous prime is 21603271470721. The next prime is 21603271470757. The reversal of 21603271470725 is 52707417230612.

It is not a de Polignac number, because 21603271470725 - 2² = 21603271470721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21603271470725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603271470721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39599507 + ... + 40141343.

It is an arithmetic number, because the mean of its divisors is an integer number (642853942016).

Almost surely, 2^{21603271470725} is an apocalyptic number.

21603271470725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21603271470725 is a deficient number, since it is larger than the sum of its proper divisors (9253717746043).

21603271470725 is a wasteful number, since it uses less digits than its factorization.

21603271470725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543654 (or 543649 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 21603271470725 in words is "twenty-one trillion, six hundred three billion, two hundred seventy-one million, four hundred seventy thousand, seven hundred twenty-five".