20520143452 has 24 divisors (see below), whose sum is σ = 36352173312. Its totient is φ = 10133871600.

The previous prime is 20520143447. The next prime is 20520143489. The reversal of 20520143452 is 25434102502.

It is a self number, because there is not a number n which added to its sum of digits gives 20520143452.

It is a congruent number.

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, 2429677 + ... + 2438107.

It is an arithmetic number, because the mean of its divisors is an integer number (1514673888).

Almost surely, 2^20520143452 is an apocalyptic number.

It is an amenable number.

20520143452 is a deficient number, since it is larger than the sum of its proper divisors (15832029860).

20520143452 is a wasteful number, since it uses less digits than its factorization.

20520143452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15849 (or 15847 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 20520143452 its reverse (25434102502), we get a palindrome (45954245954).

The spelling of 20520143452 in words is "twenty billion, five hundred twenty million, one hundred forty-three thousand, four hundred fifty-two".