20657504473101 has 20 divisors (see below), whose sum is σ = 30872523897600. Its totient is φ = 13765518715176.

The previous prime is 20657504473091. The next prime is 20657504473139. The reversal of 20657504473101 is 10137440575602.

20657504473101 is a `hidden beast` number, since 2 + 0 + 6 + 5 + 75 + 0 + 4 + 473 + 101 = 666.

It is not a de Polignac number, because 20657504473101 - 2¹⁸ = 20657504210957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20657504473301) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56770611 + ... + 57133328.

It is an arithmetic number, because the mean of its divisors is an integer number (1543626194880).

Almost surely, 2^{20657504473101} is an apocalyptic number.

It is an amenable number.

20657504473101 is a deficient number, since it is larger than the sum of its proper divisors (10215019424499).

20657504473101 is a wasteful number, since it uses less digits than its factorization.

20657504473101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113906190 (or 113906181 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 20657504473101 in words is "twenty trillion, six hundred fifty-seven billion, five hundred four million, four hundred seventy-three thousand, one hundred one".