20591478935 has 16 divisors (see below), whose sum is σ = 24782127552. Its totient is φ = 16425024000.

The previous prime is 20591478917. The next prime is 20591478953. The reversal of 20591478935 is 53987419502.

It is an interprime number because it is at equal distance from previous prime (20591478917) and next prime (20591478953).

It is not a de Polignac number, because 20591478935 - 2¹⁰ = 20591477911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2544095 + ... + 2552175.

It is an arithmetic number, because the mean of its divisors is an integer number (1548882972).

Almost surely, 2^20591478935 is an apocalyptic number.

20591478935 is a deficient number, since it is larger than the sum of its proper divisors (4190648617).

20591478935 is an equidigital number, since it uses as much as digits as its factorization.

20591478935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 20591478935 in words is "twenty billion, five hundred ninety-one million, four hundred seventy-eight thousand, nine hundred thirty-five".