20775738 has 8 divisors (see below), whose sum is σ = 41551488. Its totient is φ = 6925244.

The previous prime is 20775737. The next prime is 20775749. The reversal of 20775738 is 83757702.

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

20775738 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20775696 and 20775705.

It is not an unprimeable number, because it can be changed into a prime (20775731) 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, 1731306 + ... + 1731317.

It is an arithmetic number, because the mean of its divisors is an integer number (5193936).

Almost surely, 2^20775738 is an apocalyptic number.

20775738 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.

20775738 is a wasteful number, since it uses less digits than its factorization.

20775738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462628.

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 20775738 is about 4558.0410265815. The cubic root of 20775738 is about 274.9068025788.

The spelling of 20775738 in words is "twenty million, seven hundred seventy-five thousand, seven hundred thirty-eight".