20404120000 has 280 divisors, whose sum is σ = 55989077760. Its totient is φ = 7313280000.

The previous prime is 20404119959. The next prime is 20404120021. The reversal of 20404120000 is 2140402.

It is a super-2 number, since 2×20404120000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 34759707 + ... + 34760293.

It is an arithmetic number, because the mean of its divisors is an integer number (199960992).

Almost surely, 2^20404120000 is an apocalyptic number.

20404120000 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 20404120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27994538880).

20404120000 is an abundant number, since it is smaller than the sum of its proper divisors (35584957760).

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

20404120000 is an equidigital number, since it uses as much as digits as its factorization.

20404120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20404120000 its reverse (2140402), we get a palindrome (20406260402).

The spelling of 20404120000 in words is "twenty billion, four hundred four million, one hundred twenty thousand".