20503640452 has 24 divisors (see below), whose sum is σ = 36238731480. Its totient is φ = 10150183680.

The previous prime is 20503640429. The next prime is 20503640453. The reversal of 20503640452 is 25404630502.

It can be written as a sum of positive squares in 4 ways, for example, as 637865536 + 19865774916 = 25256^2 + 140946^2 .

It is not an unprimeable number, because it can be changed into a prime (20503640453) 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, 118374 + ... + 234562.

It is an arithmetic number, because the mean of its divisors is an integer number (1509947145).

Almost surely, 2^20503640452 is an apocalyptic number.

It is an amenable number.

20503640452 is a deficient number, since it is larger than the sum of its proper divisors (15735091028).

20503640452 is a wasteful number, since it uses less digits than its factorization.

20503640452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116631 (or 116629 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The spelling of 20503640452 in words is "twenty billion, five hundred three million, six hundred forty thousand, four hundred fifty-two".