20842824660 has 96 divisors (see below), whose sum is σ = 66743212032. Its totient is φ = 4760776320.

The previous prime is 20842824643. The next prime is 20842824683. The reversal of 20842824660 is 6642824802.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 618199 + ... + 651041.

It is an arithmetic number, because the mean of its divisors is an integer number (695241792).

Almost surely, 2^20842824660 is an apocalyptic number.

20842824660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20842824660 is an abundant number, since it is smaller than the sum of its proper divisors (45900387372).

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

20842824660 is a wasteful number, since it uses less digits than its factorization.

20842824660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34373 (or 34371 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The spelling of 20842824660 in words is "twenty billion, eight hundred forty-two million, eight hundred twenty-four thousand, six hundred sixty".