20512031542 has 8 divisors (see below), whose sum is σ = 30827104632. Its totient is φ = 10236330000.

The previous prime is 20512031537. The next prime is 20512031543. The reversal of 20512031542 is 24513021502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512031543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9841584 + ... + 9843667.

It is an arithmetic number, because the mean of its divisors is an integer number (3853388079).

Almost surely, 2^20512031542 is an apocalyptic number.

20512031542 is a deficient number, since it is larger than the sum of its proper divisors (10315073090).

20512031542 is a wasteful number, since it uses less digits than its factorization.

20512031542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19685774.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 20512031542 in words is "twenty billion, five hundred twelve million, thirty-one thousand, five hundred forty-two".