202123020040 has 16 divisors (see below), whose sum is σ = 454776795180. Its totient is φ = 80849208000.

The previous prime is 202123020013. The next prime is 202123020049. The reversal of 202123020040 is 40020321202.

202123020040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 171579865284 + 30543154756 = 414222^2 + 174766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202123019996 and 202123020023.

It is not an unprimeable number, because it can be changed into a prime (202123020049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2526537711 + ... + 2526537790.

Almost surely, 2^202123020040 is an apocalyptic number.

202123020040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202123020040 is an abundant number, since it is smaller than the sum of its proper divisors (252653775140).

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

202123020040 is a wasteful number, since it uses less digits than its factorization.

202123020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053075512 (or 5053075508 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 202123020040 its reverse (40020321202), we get a palindrome (242143341242).

The spelling of 202123020040 in words is "two hundred two billion, one hundred twenty-three million, twenty thousand, forty".