20524555121 has 16 divisors (see below), whose sum is σ = 23962435200. Its totient is φ = 17214882048.

The previous prime is 20524555087. The next prime is 20524555133. The reversal of 20524555121 is 12155542502.

It is a happy number.

It is not a de Polignac number, because 20524555121 - 2¹⁰ = 20524554097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20524575121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67625 + ... + 213593.

It is an arithmetic number, because the mean of its divisors is an integer number (1497652200).

Almost surely, 2^20524555121 is an apocalyptic number.

It is an amenable number.

20524555121 is a deficient number, since it is larger than the sum of its proper divisors (3437880079).

20524555121 is a wasteful number, since it uses less digits than its factorization.

20524555121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146408.

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 20524555121 in words is "twenty billion, five hundred twenty-four million, five hundred fifty-five thousand, one hundred twenty-one".