20966579737528 has 48 divisors (see below), whose sum is σ = 42373078555680. Its totient is φ = 9720228393216.

The previous prime is 20966579737513. The next prime is 20966579737529. The reversal of 20966579737528 is 82573797566902.

It is a Harshad number since it is a multiple of its sum of digits (76).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20966579737529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77097201 + ... + 77368672.

It is an arithmetic number, because the mean of its divisors is an integer number (882772469910).

Almost surely, 2^{20966579737528} is an apocalyptic number.

It is an amenable number.

20966579737528 is an abundant number, since it is smaller than the sum of its proper divisors (21406498818152).

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

20966579737528 is a wasteful number, since it uses less digits than its factorization.

20966579737528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154465964 (or 154465941 counting only the distinct ones).

The product of its (nonzero) digits is 2400451200, while the sum is 76.

The spelling of 20966579737528 in words is "twenty trillion, nine hundred sixty-six billion, five hundred seventy-nine million, seven hundred thirty-seven thousand, five hundred twenty-eight".