20520000043204 has 12 divisors (see below), whose sum is σ = 35910124166700. Its totient is φ = 10259964567008.

The previous prime is 20520000043201. The next prime is 20520000043267. The reversal of 20520000043204 is 40234000002502.

It can be written as a sum of positive squares in 2 ways, for example, as 13503434788804 + 7016565254400 = 3674702^2 + 2648880^2 .

It is not an unprimeable number, because it can be changed into a prime (20520000043201) 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, 7539439 + ... + 9893590.

It is an arithmetic number, because the mean of its divisors is an integer number (2992510347225).

Almost surely, 2^{20520000043204} is an apocalyptic number.

It is an amenable number.

20520000043204 is a deficient number, since it is larger than the sum of its proper divisors (15390124123496).

20520000043204 is a wasteful number, since it uses less digits than its factorization.

20520000043204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17727302 (or 17727300 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 20520000043204 its reverse (40234000002502), we get a palindrome (60754000045706).

The spelling of 20520000043204 in words is "twenty trillion, five hundred twenty billion, forty-three thousand, two hundred four".