20528671398 has 8 divisors (see below), whose sum is σ = 41057342808. Its totient is φ = 6842890464.

The previous prime is 20528671357. The next prime is 20528671399. The reversal of 20528671398 is 89317682502.

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

20528671398 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20528671398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20528671399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1710722611 + ... + 1710722622.

It is an arithmetic number, because the mean of its divisors is an integer number (5132167851).

Almost surely, 2^20528671398 is an apocalyptic number.

20528671398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20528671398 is a wasteful number, since it uses less digits than its factorization.

20528671398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421445238.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 20528671398 in words is "twenty billion, five hundred twenty-eight million, six hundred seventy-one thousand, three hundred ninety-eight".