20845525624 has 32 divisors (see below), whose sum is σ = 48729801600. Its totient is φ = 8121633120.

The previous prime is 20845525609. The next prime is 20845525633. The reversal of 20845525624 is 42652554802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16919454 + ... + 16920685.

It is an arithmetic number, because the mean of its divisors is an integer number (1522806300).

Almost surely, 2^20845525624 is an apocalyptic number.

It is an amenable number.

20845525624 is an abundant number, since it is smaller than the sum of its proper divisors (27884275976).

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

20845525624 is a wasteful number, since it uses less digits than its factorization.

20845525624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33840163 (or 33840159 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 43.

The spelling of 20845525624 in words is "twenty billion, eight hundred forty-five million, five hundred twenty-five thousand, six hundred twenty-four".