20349356 has 12 divisors (see below), whose sum is σ = 36195600. Its totient is φ = 10007760.

The previous prime is 20349353. The next prime is 20349383. The reversal of 20349356 is 65394302.

It is a super-2 number, since 2×20349356² = 828192579229472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20349353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41456 + ... + 41943.

It is an arithmetic number, because the mean of its divisors is an integer number (3016300).

Almost surely, 2^20349356 is an apocalyptic number.

It is an amenable number.

20349356 is a deficient number, since it is larger than the sum of its proper divisors (15846244).

20349356 is a wasteful number, since it uses less digits than its factorization.

20349356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83464 (or 83462 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 20349356 is about 4511.0260473644. The cubic root of 20349356 is about 273.0131441385.

The spelling of 20349356 in words is "twenty million, three hundred forty-nine thousand, three hundred fifty-six".