20345349025 has 12 divisors (see below), whose sum is σ = 25843556844. Its totient is φ = 15879296000.

The previous prime is 20345349019. The next prime is 20345349067. The reversal of 20345349025 is 52094354302.

It can be written as a sum of positive squares in 6 ways, for example, as 275526801 + 20069822224 = 16599^2 + 141668^2 .

It is not a de Polignac number, because 20345349025 - 2⁷ = 20345348897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9923536 + ... + 9925585.

It is an arithmetic number, because the mean of its divisors is an integer number (2153629737).

Almost surely, 2^20345349025 is an apocalyptic number.

20345349025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20345349025 is a deficient number, since it is larger than the sum of its proper divisors (5498207819).

20345349025 is a wasteful number, since it uses less digits than its factorization.

20345349025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19849172 (or 19849167 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

It can be divided in two parts, 20345 and 349025, that added together give a triangular number (369370 = T₈₅₉).

The spelling of 20345349025 in words is "twenty billion, three hundred forty-five million, three hundred forty-nine thousand, twenty-five".