20202453520 has 40 divisors (see below), whose sum is σ = 46976647320. Its totient is φ = 8079959040.

The previous prime is 20202453517. The next prime is 20202453521. The reversal of 20202453520 is 2535420202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 288728064 + 19913725456 = 16992^2 + 141116^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20202453521) 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, 1138476 + ... + 1156084.

It is an arithmetic number, because the mean of its divisors is an integer number (1174416183).

Almost surely, 2^20202453520 is an apocalyptic number.

20202453520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202453520 is an abundant number, since it is smaller than the sum of its proper divisors (26774193800).

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

20202453520 is a wasteful number, since it uses less digits than its factorization.

20202453520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31963 (or 31957 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 20202453520 its reverse (2535420202), we get a palindrome (22737873722).

The spelling of 20202453520 in words is "twenty billion, two hundred two million, four hundred fifty-three thousand, five hundred twenty".