21603272273623 has 2 divisors, whose sum is σ = 21603272273624. Its totient is φ = 21603272273622.

The previous prime is 21603272273617. The next prime is 21603272273659. The reversal of 21603272273623 is 32637227230612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21603272273623 - 2¹³ = 21603272265431 is a prime.

It is a super-2 number, since 2×21603272273623² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21603272273683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801636136811 + 10801636136812.

It is an arithmetic number, because the mean of its divisors is an integer number (10801636136812).

Almost surely, 2^{21603272273623} is an apocalyptic number.

21603272273623 is a deficient number, since it is larger than the sum of its proper divisors (1).

21603272273623 is an equidigital number, since it uses as much as digits as its factorization.

21603272273623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 46.

The spelling of 21603272273623 in words is "twenty-one trillion, six hundred three billion, two hundred seventy-two million, two hundred seventy-three thousand, six hundred twenty-three".