20953112473 has 4 divisors (see below), whose sum is σ = 20953582848. Its totient is φ = 20952642100.

The previous prime is 20953112471. The next prime is 20953112489. The reversal of 20953112473 is 37421135902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37421135902 = 2 ⋅18710567951.

It is a cyclic number.

It is not a de Polignac number, because 20953112473 - 2¹ = 20953112471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20953112471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160453 + ... + 260098.

It is an arithmetic number, because the mean of its divisors is an integer number (5238395712).

Almost surely, 2^20953112473 is an apocalyptic number.

It is an amenable number.

20953112473 is a deficient number, since it is larger than the sum of its proper divisors (470375).

20953112473 is an equidigital number, since it uses as much as digits as its factorization.

20953112473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470374.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 20953112473 in words is "twenty billion, nine hundred fifty-three million, one hundred twelve thousand, four hundred seventy-three".