20949356 has 12 divisors (see below), whose sum is σ = 36708000. Its totient is φ = 10461360.

The previous prime is 20949353. The next prime is 20949367. The reversal of 20949356 is 65394902.

It is a hoax number, since the sum of its digits (38) 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 (20949353) 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, 770 + ... + 6518.

It is an arithmetic number, because the mean of its divisors is an integer number (3059000).

Almost surely, 2^20949356 is an apocalyptic number.

It is an amenable number.

20949356 is a deficient number, since it is larger than the sum of its proper divisors (15758644).

20949356 is a wasteful number, since it uses less digits than its factorization.

20949356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664 (or 6662 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 20949356 is about 4577.0466460372. The cubic root of 20949356 is about 275.6704566441.

The spelling of 20949356 in words is "twenty million, nine hundred forty-nine thousand, three hundred fifty-six".