20202020240 has 40 divisors (see below), whose sum is σ = 47213099448. Its totient is φ = 8038932480.

The previous prime is 20202020233. The next prime is 20202020273. The reversal of 20202020240 is 4202020202.

It can be written as a sum of positive squares in 4 ways, for example, as 1417673104 + 18784347136 = 37652^2 + 137056^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638771 + ... + 669650.

Almost surely, 2^20202020240 is an apocalyptic number.

20202020240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202020240 is an abundant number, since it is smaller than the sum of its proper divisors (27011079208).

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

20202020240 is a wasteful number, since it uses less digits than its factorization.

20202020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308627 (or 1308621 counting only the distinct ones).

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

Adding to 20202020240 its reverse (4202020202), we get a palindrome (24404040442).

The spelling of 20202020240 in words is "twenty billion, two hundred two million, twenty thousand, two hundred forty".