20024004400 has 60 divisors (see below), whose sum is σ = 48164889472. Its totient is φ = 8000075520.

The previous prime is 20024004397. The next prime is 20024004443. The reversal of 20024004400 is 440042002.

It is a super-2 number, since 2×20024004400² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311857 + ... + 370543.

Almost surely, 2^20024004400 is an apocalyptic number.

20024004400 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 20024004400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24082444736).

20024004400 is an abundant number, since it is smaller than the sum of its proper divisors (28140885072).

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

20024004400 is a wasteful number, since it uses less digits than its factorization.

20024004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59558 (or 59547 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20024004400 its reverse (440042002), we get a palindrome (20464046402).

The spelling of 20024004400 in words is "twenty billion, twenty-four million, four thousand, four hundred".