20409624129 has 8 divisors (see below), whose sum is σ = 27284635360. Its totient is φ = 13570514496.

The previous prime is 20409624127. The next prime is 20409624203. The reversal of 20409624129 is 92142690402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20409624129 - 2¹ = 20409624127 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8974072 + ... + 8976345.

It is an arithmetic number, because the mean of its divisors is an integer number (3410579420).

Almost surely, 2^20409624129 is an apocalyptic number.

It is an amenable number.

20409624129 is a deficient number, since it is larger than the sum of its proper divisors (6875011231).

20409624129 is a wasteful number, since it uses less digits than its factorization.

20409624129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17950799.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 20409624129 in words is "twenty billion, four hundred nine million, six hundred twenty-four thousand, one hundred twenty-nine".