20749084 has 6 divisors (see below), whose sum is σ = 36310904. Its totient is φ = 10374540.

The previous prime is 20749073. The next prime is 20749103. The reversal of 20749084 is 48094702.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2593632 + ... + 2593639.

Almost surely, 2^20749084 is an apocalyptic number.

It is an amenable number.

20749084 is a deficient number, since it is larger than the sum of its proper divisors (15561820).

20749084 is a wasteful number, since it uses less digits than its factorization.

20749084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5187275 (or 5187273 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20749084 is about 4555.1162444004. The cubic root of 20749084 is about 274.7891894015.

The spelling of 20749084 in words is "twenty million, seven hundred forty-nine thousand, eighty-four".