20749324 has 12 divisors (see below), whose sum is σ = 36823248. Its totient is φ = 10228400.

The previous prime is 20749303. The next prime is 20749327. The reversal of 20749324 is 42394702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20749327) 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, 36247 + ... + 36814.

It is an arithmetic number, because the mean of its divisors is an integer number (3068604).

Almost surely, 2^20749324 is an apocalyptic number.

It is an amenable number.

20749324 is a deficient number, since it is larger than the sum of its proper divisors (16073924).

20749324 is a wasteful number, since it uses less digits than its factorization.

20749324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73136 (or 73134 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20749324 is about 4555.1425883281. The cubic root of 20749324 is about 274.7902488723.

The spelling of 20749324 in words is "twenty million, seven hundred forty-nine thousand, three hundred twenty-four".