20528912129 has 8 divisors (see below), whose sum is σ = 22405662720. Its totient is φ = 18653909200.

The previous prime is 20528912077. The next prime is 20528912137. The reversal of 20528912129 is 92121982502.

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

It is a cyclic number.

It is not a de Polignac number, because 20528912129 - 2¹⁶ = 20528846593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20528912179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412289 + ... + 459390.

It is an arithmetic number, because the mean of its divisors is an integer number (2800707840).

Almost surely, 2^20528912129 is an apocalyptic number.

It is an amenable number.

20528912129 is a deficient number, since it is larger than the sum of its proper divisors (1876750591).

20528912129 is a wasteful number, since it uses less digits than its factorization.

20528912129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873831.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 20528912129 in words is "twenty billion, five hundred twenty-eight million, nine hundred twelve thousand, one hundred twenty-nine".