40202240020 has 24 divisors (see below), whose sum is σ = 84428502984. Its totient is φ = 16080172416.

The previous prime is 40202240009. The next prime is 40202240021. The reversal of 40202240020 is 2004220204.

It can be written as a sum of positive squares in 4 ways, for example, as 26832405636 + 13369834384 = 163806^2 + 115628^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40202239976 and 40202240003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40202240021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760282 + ... + 811438.

It is an arithmetic number, because the mean of its divisors is an integer number (3517854291).

Almost surely, 2^40202240020 is an apocalyptic number.

It is an amenable number.

40202240020 is an abundant number, since it is smaller than the sum of its proper divisors (44226262964).

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

40202240020 is a wasteful number, since it uses less digits than its factorization.

40202240020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90459 (or 90457 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 40202240020 its reverse (2004220204), we get a palindrome (42206460224).

The spelling of 40202240020 in words is "forty billion, two hundred two million, two hundred forty thousand, twenty".