20528594026668 has 360 divisors, whose sum is σ = 66451016873472. Its totient is φ = 5411046146688.

The previous prime is 20528594026663. The next prime is 20528594026697. The reversal of 20528594026668 is 86662049582502.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (20528594026663) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 715591821 + ... + 715620507.

Almost surely, 2^{20528594026668} is an apocalyptic number.

20528594026668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20528594026668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33225508436736).

20528594026668 is an abundant number, since it is smaller than the sum of its proper divisors (45922422846804).

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

20528594026668 is a wasteful number, since it uses less digits than its factorization.

20528594026668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30603 (or 30579 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 63.

The spelling of 20528594026668 in words is "twenty trillion, five hundred twenty-eight billion, five hundred ninety-four million, twenty-six thousand, six hundred sixty-eight".