20120200040 has 16 divisors (see below), whose sum is σ = 45270450180. Its totient is φ = 8048080000.

The previous prime is 20120200039. The next prime is 20120200049. The reversal of 20120200040 is 4000202102.

It can be written as a sum of positive squares in 2 ways, for example, as 19114168516 + 1006031524 = 138254^2 + 31718^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20120199994 and 20120200030.

It is not an unprimeable number, because it can be changed into a prime (20120200049) 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 3 ways as a sum of consecutive naturals, for example, 251502461 + ... + 251502540.

Almost surely, 2^20120200040 is an apocalyptic number.

20120200040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120200040 is an abundant number, since it is smaller than the sum of its proper divisors (25150250140).

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

20120200040 is a wasteful number, since it uses less digits than its factorization.

20120200040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503005012 (or 503005008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20120200040 its reverse (4000202102), we get a palindrome (24120402142).

The spelling of 20120200040 in words is "twenty billion, one hundred twenty million, two hundred thousand, forty".