20883946 has 8 divisors (see below), whose sum is σ = 31345380. Its totient is φ = 10435488.

The previous prime is 20883943. The next prime is 20883979. The reversal of 20883946 is 64938802.

It can be written as a sum of positive squares in 2 ways, for example, as 20802721 + 81225 = 4561^2 + 285^2 .

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

It is a super-2 number, since 2×20883946² = 872278401061832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20883899 and 20883908.

It is not an unprimeable number, because it can be changed into a prime (20883943) 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, 4180 + ... + 7696.

Almost surely, 2^20883946 is an apocalyptic number.

20883946 is a deficient number, since it is larger than the sum of its proper divisors (10461434).

20883946 is a wasteful number, since it uses less digits than its factorization.

20883946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6488.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 20883946 is about 4569.8956224404. The cubic root of 20883946 is about 275.3832496637.

The spelling of 20883946 in words is "twenty million, eight hundred eighty-three thousand, nine hundred forty-six".