20315255603 has 2 divisors, whose sum is σ = 20315255604. Its totient is φ = 20315255602.

The previous prime is 20315255591. The next prime is 20315255633. The reversal of 20315255603 is 30655251302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20315255603 - 2⁶ = 20315255539 is a prime.

It is a super-2 number, since 2×20315255603² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20315255603.

It is not a weakly prime, because it can be changed into another prime (20315255633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157627801 + 10157627802.

It is an arithmetic number, because the mean of its divisors is an integer number (10157627802).

Almost surely, 2^20315255603 is an apocalyptic number.

20315255603 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315255603 is an equidigital number, since it uses as much as digits as its factorization.

20315255603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 20315255603 in words is "twenty billion, three hundred fifteen million, two hundred fifty-five thousand, six hundred three".