20423504000 has 128 divisors (see below), whose sum is σ = 50886576000. Its totient is φ = 8151936000.

The previous prime is 20423503981. The next prime is 20423504021. The reversal of 20423504000 is 40532402.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×20423504000³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9582935 + ... + 9585065.

It is an arithmetic number, because the mean of its divisors is an integer number (397551375).

Almost surely, 2^20423504000 is an apocalyptic number.

20423504000 is a gapful number since it is divisible by the number (20) 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 20423504000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25443288000).

20423504000 is an abundant number, since it is smaller than the sum of its proper divisors (30463072000).

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

20423504000 is an equidigital number, since it uses as much as digits as its factorization.

20423504000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759 (or 2737 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The spelling of 20423504000 in words is "twenty billion, four hundred twenty-three million, five hundred four thousand".