20147635242545 has 16 divisors (see below), whose sum is σ = 24201088647552. Its totient is φ = 16102161828480.

The previous prime is 20147635242541. The next prime is 20147635242569. The reversal of 20147635242545 is 54524253674102.

It is a happy number.

It is not a de Polignac number, because 20147635242545 - 2² = 20147635242541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20147635242493 and 20147635242502.

It is not an unprimeable number, because it can be changed into a prime (20147635242541) 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, 35682194 + ... + 36242436.

It is an arithmetic number, because the mean of its divisors is an integer number (1512568040472).

Almost surely, 2^{20147635242545} is an apocalyptic number.

It is an amenable number.

20147635242545 is a deficient number, since it is larger than the sum of its proper divisors (4053453405007).

20147635242545 is a wasteful number, since it uses less digits than its factorization.

20147635242545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567352.

The product of its (nonzero) digits is 8064000, while the sum is 50.

The spelling of 20147635242545 in words is "twenty trillion, one hundred forty-seven billion, six hundred thirty-five million, two hundred forty-two thousand, five hundred forty-five".