20520432530542 has 48 divisors (see below), whose sum is σ = 36250719078672. Its totient is φ = 8685334331520.

The previous prime is 20520432530509. The next prime is 20520432530557. The reversal of 20520432530542 is 24503523402502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21835098 + ... + 22755490.

It is an arithmetic number, because the mean of its divisors is an integer number (755223314139).

Almost surely, 2^{20520432530542} is an apocalyptic number.

20520432530542 is a deficient number, since it is larger than the sum of its proper divisors (15730286548130).

20520432530542 is a wasteful number, since it uses less digits than its factorization.

20520432530542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923233 (or 923226 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 37.

The spelling of 20520432530542 in words is "twenty trillion, five hundred twenty billion, four hundred thirty-two million, five hundred thirty thousand, five hundred forty-two".