20774438 has 8 divisors (see below), whose sum is σ = 31320432. Its totient is φ = 10334296.

The previous prime is 20774437. The next prime is 20774443. The reversal of 20774438 is 83447702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20774398 and 20774407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20774437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25970 + ... + 26757.

It is an arithmetic number, because the mean of its divisors is an integer number (3915054).

Almost surely, 2^20774438 is an apocalyptic number.

20774438 is a deficient number, since it is larger than the sum of its proper divisors (10545994).

20774438 is a wasteful number, since it uses less digits than its factorization.

20774438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52926.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 20774438 is about 4557.8984192279. The cubic root of 20774438 is about 274.9010685458.

It can be divided in two parts, 20774 and 438, that added together give a palindrome (21212).

The spelling of 20774438 in words is "twenty million, seven hundred seventy-four thousand, four hundred thirty-eight".