20218200040 has 32 divisors (see below), whose sum is σ = 45502663680. Its totient is φ = 8085197632.

The previous prime is 20218199999. The next prime is 20218200047. The reversal of 20218200040 is 4000281202.

It is a super-2 number, since 2×20218200040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20218199990 and 20218200017.

It is not an unprimeable number, because it can be changed into a prime (20218200047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97209 + ... + 223351.

It is an arithmetic number, because the mean of its divisors is an integer number (1421958240).

Almost surely, 2^20218200040 is an apocalyptic number.

20218200040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20218200040 is an abundant number, since it is smaller than the sum of its proper divisors (25284463640).

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

20218200040 is a wasteful number, since it uses less digits than its factorization.

20218200040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130161 (or 130157 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20218200040 its reverse (4000281202), we get a palindrome (24218481242).

The spelling of 20218200040 in words is "twenty billion, two hundred eighteen million, two hundred thousand, forty".