20110404420 has 72 divisors (see below), whose sum is σ = 61013750616. Its totient is φ = 5361702912.

The previous prime is 20110404329. The next prime is 20110404427. The reversal of 20110404420 is 2440401102.

20110404420 is a `hidden beast` number, since 201 + 1 + 0 + 40 + 4 + 420 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8085966084 + 12024438336 = 89922^2 + 109656^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20110404393 and 20110404402.

It is not an unprimeable number, because it can be changed into a prime (20110404427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1355764 + ... + 1370516.

It is an arithmetic number, because the mean of its divisors is an integer number (847413203).

Almost surely, 2^20110404420 is an apocalyptic number.

20110404420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110404420 is an abundant number, since it is smaller than the sum of its proper divisors (40903346196).

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

20110404420 is a wasteful number, since it uses less digits than its factorization.

20110404420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22341 (or 22336 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20110404420 its reverse (2440401102), we get a palindrome (22550805522).

The spelling of 20110404420 in words is "twenty billion, one hundred ten million, four hundred four thousand, four hundred twenty".