20404404024 has 64 divisors (see below), whose sum is σ = 51184224000. Its totient is φ = 6778421760.

The previous prime is 20404403951. The next prime is 20404404061. The reversal of 20404404024 is 42040440402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20404403985 and 20404404003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13087357 + ... + 13088915.

It is an arithmetic number, because the mean of its divisors is an integer number (799753500).

Almost surely, 2^20404404024 is an apocalyptic number.

20404404024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20404404024 is an abundant number, since it is smaller than the sum of its proper divisors (30779819976).

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

20404404024 is a wasteful number, since it uses less digits than its factorization.

20404404024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068 (or 3064 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20404404024 its reverse (42040440402), we get a palindrome (62444844426).

The spelling of 20404404024 in words is "twenty billion, four hundred four million, four hundred four thousand, twenty-four".