20852785824 has 48 divisors (see below), whose sum is σ = 58949224992. Its totient is φ = 6416241408.

The previous prime is 20852785823. The next prime is 20852785829. The reversal of 20852785824 is 42858725802.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (20852785823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8353234 + ... + 8355729.

It is an arithmetic number, because the mean of its divisors is an integer number (1228108854).

Almost surely, 2^20852785824 is an apocalyptic number.

20852785824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20852785824 is an abundant number, since it is smaller than the sum of its proper divisors (38096439168).

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

20852785824 is a wasteful number, since it uses less digits than its factorization.

20852785824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16708989 (or 16708981 counting only the distinct ones).

The product of its (nonzero) digits is 2867200, while the sum is 51.

The spelling of 20852785824 in words is "twenty billion, eight hundred fifty-two million, seven hundred eighty-five thousand, eight hundred twenty-four".