20346149 has 4 divisors (see below), whose sum is σ = 20471136. Its totient is φ = 20221164.

The previous prime is 20346121. The next prime is 20346187. The reversal of 20346149 is 94164302.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20346149 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 (20346119) 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 3 ways as a sum of consecutive naturals, for example, 62249 + ... + 62574.

It is an arithmetic number, because the mean of its divisors is an integer number (5117784).

Almost surely, 2^20346149 is an apocalyptic number.

It is an amenable number.

20346149 is a deficient number, since it is larger than the sum of its proper divisors (124987).

20346149 is a wasteful number, since it uses less digits than its factorization.

20346149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124986.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20346149 is about 4510.6705709905. The cubic root of 20346149 is about 272.9988013562.

The spelling of 20346149 in words is "twenty million, three hundred forty-six thousand, one hundred forty-nine".