20586090949 has 4 divisors (see below), whose sum is σ = 21669569440. Its totient is φ = 19502612460.

The previous prime is 20586090937. The next prime is 20586091013. The reversal of 20586090949 is 94909068502.

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: 94909068502 = 2 ⋅47454534251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20586090949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20586090896 and 20586090905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20586090149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541739217 + ... + 541739254.

It is an arithmetic number, because the mean of its divisors is an integer number (5417392360).

Almost surely, 2^20586090949 is an apocalyptic number.

It is an amenable number.

20586090949 is a deficient number, since it is larger than the sum of its proper divisors (1083478491).

20586090949 is a wasteful number, since it uses less digits than its factorization.

20586090949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083478490.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 20586090949 in words is "twenty billion, five hundred eighty-six million, ninety thousand, nine hundred forty-nine".