20020012040 has 64 divisors (see below), whose sum is σ = 53140700160. Its totient is φ = 6642581760.

The previous prime is 20020012013. The next prime is 20020012043. The reversal of 20020012040 is 4021002002.

It is not an unprimeable number, because it can be changed into a prime (20020012043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1144547 + ... + 1161906.

It is an arithmetic number, because the mean of its divisors is an integer number (830323440).

Almost surely, 2^20020012040 is an apocalyptic number.

20020012040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020012040 is an abundant number, since it is smaller than the sum of its proper divisors (33120688120).

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

20020012040 is a wasteful number, since it uses less digits than its factorization.

20020012040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306502 (or 2306498 counting only the distinct ones).

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

Adding to 20020012040 its reverse (4021002002), we get a palindrome (24041014042).

The spelling of 20020012040 in words is "twenty billion, twenty million, twelve thousand, forty".