20678444 has 12 divisors (see below), whose sum is σ = 36225000. Its totient is φ = 10328448.

The previous prime is 20678431. The next prime is 20678447. The reversal of 20678444 is 44487602.

It is a super-2 number, since 2×20678444² = 855196092522272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20678447) 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, 2927 + ... + 7065.

It is an arithmetic number, because the mean of its divisors is an integer number (3018750).

Almost surely, 2^20678444 is an apocalyptic number.

It is an amenable number.

20678444 is a deficient number, since it is larger than the sum of its proper divisors (15546556).

20678444 is a wasteful number, since it uses less digits than its factorization.

20678444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392 (or 5390 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 20678444 is about 4547.3557151382. The cubic root of 20678444 is about 274.4769960473.

It can be divided in two parts, 2067844 and 4, that multiplied together give a square (8271376 = 2876²).

The spelling of 20678444 in words is "twenty million, six hundred seventy-eight thousand, four hundred forty-four".