20620454851143 has 18 divisors (see below), whose sum is σ = 34647975158784. Its totient is φ = 11783117057544.

The previous prime is 20620454851103. The next prime is 20620454851211. The reversal of 20620454851143 is 34115845402602.

20620454851143 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 0 + 454 + 8 + 51 + 143 = 666.

It is not a de Polignac number, because 20620454851143 - 2⁸ = 20620454850887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620454851103) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23379200071 + ... + 23379200952.

Almost surely, 2^{20620454851143} is an apocalyptic number.

20620454851143 is a deficient number, since it is larger than the sum of its proper divisors (14027520307641).

20620454851143 is a wasteful number, since it uses less digits than its factorization.

20620454851143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46758401043 (or 46758401033 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 20620454851143 in words is "twenty trillion, six hundred twenty billion, four hundred fifty-four million, eight hundred fifty-one thousand, one hundred forty-three".