20575423008 has 240 divisors, whose sum is σ = 70570684800. Its totient is φ = 5878438272.

The previous prime is 20575422991. The next prime is 20575423009. The reversal of 20575423008 is 80032457502.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20575423009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 877485 + ... + 900627.

It is an arithmetic number, because the mean of its divisors is an integer number (294044520).

Almost surely, 2^20575423008 is an apocalyptic number.

20575423008 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20575423008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35285342400).

20575423008 is an abundant number, since it is smaller than the sum of its proper divisors (49995261792).

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

20575423008 is an equidigital number, since it uses as much as digits as its factorization.

20575423008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23186 (or 23155 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 20575423008 in words is "twenty billion, five hundred seventy-five million, four hundred twenty-three thousand, eight".