20434491725 has 12 divisors (see below), whose sum is σ = 26829286164. Its totient is φ = 15385969920.

The previous prime is 20434491719. The next prime is 20434491733. The reversal of 20434491725 is 52719443402.

It can be written as a sum of positive squares in 6 ways, for example, as 579990889 + 19854500836 = 24083^2 + 140906^2 .

It is not a de Polignac number, because 20434491725 - 2⁶ = 20434491661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24040154 + ... + 24041003.

It is an arithmetic number, because the mean of its divisors is an integer number (2235773847).

Almost surely, 2^20434491725 is an apocalyptic number.

20434491725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20434491725 is a deficient number, since it is larger than the sum of its proper divisors (6394794439).

20434491725 is a wasteful number, since it uses less digits than its factorization.

20434491725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48081184 (or 48081179 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 20434491725 in words is "twenty billion, four hundred thirty-four million, four hundred ninety-one thousand, seven hundred twenty-five".