20000404585672 has 128 divisors (see below), whose sum is σ = 44281710063360. Its totient is φ = 8290762260480.

The previous prime is 20000404585573. The next prime is 20000404585699. The reversal of 20000404585672 is 27658540400002.

It is a happy 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, 129759483 + ... + 129913525.

It is an arithmetic number, because the mean of its divisors is an integer number (345950859870).

Almost surely, 2^{20000404585672} 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 20000404585672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22140855031680).

20000404585672 is an abundant number, since it is smaller than the sum of its proper divisors (24281305477688).

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

20000404585672 is a wasteful number, since it uses less digits than its factorization.

20000404585672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154583 (or 154579 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 43.

Adding to 20000404585672 its reverse (27658540400002), we get a palindrome (47658944985674).

The spelling of 20000404585672 in words is "twenty trillion, four hundred four million, five hundred eighty-five thousand, six hundred seventy-two".