20505953083 has 16 divisors (see below), whose sum is σ = 25761035520. Its totient is φ = 15856682400.

The previous prime is 20505953057. The next prime is 20505953087. The reversal of 20505953083 is 38035950502.

20505953083 is nontrivially palindromic in base 5.

It is a cyclic number.

It is not a de Polignac number, because 20505953083 - 2²⁵ = 20472398651 is a prime.

It is a super-2 number, since 2×20505953083² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20505953087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1006368 + ... + 1026541.

It is an arithmetic number, because the mean of its divisors is an integer number (1610064720).

Almost surely, 2^20505953083 is an apocalyptic number.

20505953083 is a deficient number, since it is larger than the sum of its proper divisors (5255082437).

20505953083 is a wasteful number, since it uses less digits than its factorization.

20505953083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033058.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 20505953083 in words is "twenty billion, five hundred five million, nine hundred fifty-three thousand, eighty-three".