202000420040 has 64 divisors (see below), whose sum is σ = 465154099200. Its totient is φ = 78919955712.

The previous prime is 202000420031. The next prime is 202000420079. The reversal of 202000420040 is 40024000202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 202000419997 and 202000420024.

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, 259121 + ... + 686399.

It is an arithmetic number, because the mean of its divisors is an integer number (7268032800).

Almost surely, 2^202000420040 is an apocalyptic number.

202000420040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202000420040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232577049600).

202000420040 is an abundant number, since it is smaller than the sum of its proper divisors (263153679160).

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

202000420040 is a wasteful number, since it uses less digits than its factorization.

202000420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427566 (or 427562 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 202000420040 its reverse (40024000202), we get a palindrome (242024420242).

The spelling of 202000420040 in words is "two hundred two billion, four hundred twenty thousand, forty".