20423128956000 has 192 divisors, whose sum is σ = 70427548638720. Its totient is φ = 5159527257600.

The previous prime is 20423128955993. The next prime is 20423128956023. The reversal of 20423128956000 is 65982132402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44559564 + ... + 45015563.

It is an arithmetic number, because the mean of its divisors is an integer number (366810149160).

Almost surely, 2^{20423128956000} is an apocalyptic number.

20423128956000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423128956000 is an abundant number, since it is smaller than the sum of its proper divisors (50004419682720).

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

20423128956000 is a wasteful number, since it uses less digits than its factorization.

20423128956000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89575174 (or 89575156 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 20423128956000 in words is "twenty trillion, four hundred twenty-three billion, one hundred twenty-eight million, nine hundred fifty-six thousand".