20556711153 has 24 divisors (see below), whose sum is σ = 32848635456. Its totient is φ = 12283135200.

The previous prime is 20556711137. The next prime is 20556711157. The reversal of 20556711153 is 35111765502.

It is a happy number.

20556711153 is a `hidden beast` number, since 20 + 556 + 71 + 1 + 15 + 3 = 666.

It is not a de Polignac number, because 20556711153 - 2⁴ = 20556711137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20556711157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1455250 + ... + 1469307.

It is an arithmetic number, because the mean of its divisors is an integer number (1368693144).

Almost surely, 2^20556711153 is an apocalyptic number.

It is an amenable number.

20556711153 is a deficient number, since it is larger than the sum of its proper divisors (12291924303).

20556711153 is a wasteful number, since it uses less digits than its factorization.

20556711153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924645 (or 2924642 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The spelling of 20556711153 in words is "twenty billion, five hundred fifty-six million, seven hundred eleven thousand, one hundred fifty-three".