20409624125 has 32 divisors (see below), whose sum is σ = 29421325440. Its totient is φ = 13970208000.

The previous prime is 20409624119. The next prime is 20409624127. The reversal of 20409624125 is 52142690402.

It is not a de Polignac number, because 20409624125 - 2¹⁴ = 20409607741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20409624127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 413195 + ... + 459944.

It is an arithmetic number, because the mean of its divisors is an integer number (919416420).

Almost surely, 2^20409624125 is an apocalyptic number.

20409624125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20409624125 is a deficient number, since it is larger than the sum of its proper divisors (9011701315).

20409624125 is a wasteful number, since it uses less digits than its factorization.

20409624125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873182 (or 873172 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 20409624125 in words is "twenty billion, four hundred nine million, six hundred twenty-four thousand, one hundred twenty-five".