20434515025 has 12 divisors (see below), whose sum is σ = 26440486272. Its totient is φ = 15636845840.

The previous prime is 20434515019. The next prime is 20434515097. The reversal of 20434515025 is 52051543402.

It is not a de Polignac number, because 20434515025 - 2¹⁹ = 20433990737 is a prime.

It is a Duffinian 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, 17768569 + ... + 17769718.

It is an arithmetic number, because the mean of its divisors is an integer number (2203373856).

Almost surely, 2^20434515025 is an apocalyptic number.

20434515025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20434515025 is a deficient number, since it is larger than the sum of its proper divisors (6005971247).

20434515025 is a wasteful number, since it uses less digits than its factorization.

20434515025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35538320 (or 35538315 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 20434515025 in words is "twenty billion, four hundred thirty-four million, five hundred fifteen thousand, twenty-five".