20404040460 has 48 divisors (see below), whose sum is σ = 57153104736. Its totient is φ = 5439002112.

The previous prime is 20404040413. The next prime is 20404040483. The reversal of 20404040460 is 6404040402.

It is a self number, because there is not a number n which added to its sum of digits gives 20404040460.

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, 97104 + ... + 224136.

It is an arithmetic number, because the mean of its divisors is an integer number (1190689682).

Almost surely, 2^20404040460 is an apocalyptic number.

20404040460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404040460 is an abundant number, since it is smaller than the sum of its proper divisors (36749064276).

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

20404040460 is a wasteful number, since it uses less digits than its factorization.

20404040460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129722 (or 129720 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20404040460 its reverse (6404040402), we get a palindrome (26808080862).

The spelling of 20404040460 in words is "twenty billion, four hundred four million, forty thousand, four hundred sixty".