21572611203 has 54 divisors (see below), whose sum is σ = 34292969508. Its totient is φ = 12048241920.

The previous prime is 21572611183. The next prime is 21572611259. The reversal of 21572611203 is 30211627512.

It is not a de Polignac number, because 21572611203 - 2³⁴ = 4392742019 is a prime.

It is a super-2 number, since 2×21572611203² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21572611273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 36378475 + ... + 36379067.

Almost surely, 2^21572611203 is an apocalyptic number.

21572611203 is a deficient number, since it is larger than the sum of its proper divisors (12720358305).

21572611203 is an equidigital number, since it uses as much as digits as its factorization.

21572611203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 21572611203 in words is "twenty-one billion, five hundred seventy-two million, six hundred eleven thousand, two hundred three".