20455500242542 has 32 divisors (see below), whose sum is σ = 31498496820000. Its totient is φ = 9957067776000.

The previous prime is 20455500242531. The next prime is 20455500242609. The reversal of 20455500242542 is 24524200555402.

It is a junction number, because it is equal to n+sod(n) for n = 20455500242495 and 20455500242504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392827684 + ... + 392879752.

It is an arithmetic number, because the mean of its divisors is an integer number (984328025625).

Almost surely, 2^{20455500242542} is an apocalyptic number.

20455500242542 is a deficient number, since it is larger than the sum of its proper divisors (11042996577458).

20455500242542 is a wasteful number, since it uses less digits than its factorization.

20455500242542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62212.

The product of its (nonzero) digits is 640000, while the sum is 40.

Adding to 20455500242542 its reverse (24524200555402), we get a palindrome (44979700797944).

The spelling of 20455500242542 in words is "twenty trillion, four hundred fifty-five billion, five hundred million, two hundred forty-two thousand, five hundred forty-two".