20136349 has 4 divisors (see below), whose sum is σ = 20264764. Its totient is φ = 20007936.

The previous prime is 20136331. The next prime is 20136367. The reversal of 20136349 is 94363102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94363102 = 2 ⋅47181551.

It is an interprime number because it is at equal distance from previous prime (20136331) and next prime (20136367).

It can be written as a sum of positive squares in 2 ways, for example, as 13557124 + 6579225 = 3682^2 + 2565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20136349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130349) 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, 63972 + ... + 64285.

It is an arithmetic number, because the mean of its divisors is an integer number (5066191).

Almost surely, 2^20136349 is an apocalyptic number.

It is an amenable number.

20136349 is a deficient number, since it is larger than the sum of its proper divisors (128415).

20136349 is a wasteful number, since it uses less digits than its factorization.

20136349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128414.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20136349 is about 4487.3543430400. The cubic root of 20136349 is about 272.0572120498.

The spelling of 20136349 in words is "twenty million, one hundred thirty-six thousand, three hundred forty-nine".