20634225424545 has 16 divisors (see below), whose sum is σ = 33015689096832. Its totient is φ = 11004610753920.

The previous prime is 20634225424541. The next prime is 20634225424591. The reversal of 20634225424545 is 54542452243602.

It is not a de Polignac number, because 20634225424545 - 2² = 20634225424541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20634225424494 and 20634225424503.

It is not an unprimeable number, because it can be changed into a prime (20634225424541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18790341 + ... + 19858130.

It is an arithmetic number, because the mean of its divisors is an integer number (2063480568552).

Almost surely, 2^{20634225424545} is an apocalyptic number.

It is an amenable number.

20634225424545 is a deficient number, since it is larger than the sum of its proper divisors (12381463672287).

20634225424545 is a wasteful number, since it uses less digits than its factorization.

20634225424545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38684072.

The product of its (nonzero) digits is 9216000, while the sum is 48.

The spelling of 20634225424545 in words is "twenty trillion, six hundred thirty-four billion, two hundred twenty-five million, four hundred twenty-four thousand, five hundred forty-five".