20434203625 has 16 divisors (see below), whose sum is σ = 27820241280. Its totient is φ = 14861238000.

The previous prime is 20434203623. The next prime is 20434203631. The reversal of 20434203625 is 52630243402.

It is not a de Polignac number, because 20434203625 - 2¹ = 20434203623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434203623) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7429245 + ... + 7431994.

It is an arithmetic number, because the mean of its divisors is an integer number (1738765080).

Almost surely, 2^20434203625 is an apocalyptic number.

20434203625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20434203625 is a deficient number, since it is larger than the sum of its proper divisors (7386037655).

20434203625 is a wasteful number, since it uses less digits than its factorization.

20434203625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14861265 (or 14861255 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 31.

The spelling of 20434203625 in words is "twenty billion, four hundred thirty-four million, two hundred three thousand, six hundred twenty-five".