20749204 has 12 divisors (see below), whose sum is σ = 41498464. Its totient is φ = 8892504.

The previous prime is 20749187. The next prime is 20749213. The reversal of 20749204 is 40294702.

20749204 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 741043 = 20749204 / (2 + 0 + 7 + 4 + 9 + 2 + 0 + 4).

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 in 3 ways as a sum of consecutive naturals, for example, 370494 + ... + 370549.

Almost surely, 2^20749204 is an apocalyptic number.

It is an amenable number.

20749204 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20749204 is a wasteful number, since it uses less digits than its factorization.

20749204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741054 (or 741052 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20749204 is about 4555.1294163832. The cubic root of 20749204 is about 274.7897191379.

The spelling of 20749204 in words is "twenty million, seven hundred forty-nine thousand, two hundred four".