20625122024 has 64 divisors (see below), whose sum is σ = 44225092800. Its totient is φ = 8933243904.

The previous prime is 20625121999. The next prime is 20625122039. The reversal of 20625122024 is 42022152602.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 20625121984 and 20625122002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596687 + ... + 630305.

It is an arithmetic number, because the mean of its divisors is an integer number (691017075).

Almost surely, 2^20625122024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20625122024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22112546400).

20625122024 is an abundant number, since it is smaller than the sum of its proper divisors (23599970776).

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

20625122024 is a wasteful number, since it uses less digits than its factorization.

20625122024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34002 (or 33998 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 20625122024 its reverse (42022152602), we get a palindrome (62647274626).

The spelling of 20625122024 in words is "twenty billion, six hundred twenty-five million, one hundred twenty-two thousand, twenty-four".