20404403334 has 192 divisors, whose sum is σ = 53985964032. Its totient is φ = 5654707200.

The previous prime is 20404403249. The next prime is 20404403359. The reversal of 20404403334 is 43330440402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20404403298 and 20404403307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33614859 + ... + 33615465.

It is an arithmetic number, because the mean of its divisors is an integer number (281176896).

Almost surely, 2^20404403334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20404403334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26992982016).

20404403334 is an abundant number, since it is smaller than the sum of its proper divisors (33581560698).

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

20404403334 is a wasteful number, since it uses less digits than its factorization.

20404403334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 20404403334 its reverse (43330440402), we get a palindrome (63734843736).

The spelling of 20404403334 in words is "twenty billion, four hundred four million, four hundred three thousand, three hundred thirty-four".