20013663156546 has 16 divisors (see below), whose sum is σ = 40179521473344. Its totient is φ = 6645855192144.

The previous prime is 20013663156533. The next prime is 20013663156563. The reversal of 20013663156546 is 64565136631002.

It is a junction number, because it is equal to n+sod(n) for n = 20013663156495 and 20013663156504.

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, 6341463301 + ... + 6341466456.

It is an arithmetic number, because the mean of its divisors is an integer number (2511220092084).

Almost surely, 2^{20013663156546} is an apocalyptic number.

20013663156546 is an abundant number, since it is smaller than the sum of its proper divisors (20165858316798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20013663156546 is a wasteful number, since it uses less digits than its factorization.

20013663156546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12682930025.

The product of its (nonzero) digits is 2332800, while the sum is 48.

Adding to 20013663156546 its reverse (64565136631002), we get a palindrome (84578799787548).

The spelling of 20013663156546 in words is "twenty trillion, thirteen billion, six hundred sixty-three million, one hundred fifty-six thousand, five hundred forty-six".