20969746 has 12 divisors (see below), whose sum is σ = 36590238. Its totient is φ = 8986992.

The previous prime is 20969723. The next prime is 20969783. The reversal of 20969746 is 64796902.

It can be written as a sum of positive squares in only one way, i.e., 18533025 + 2436721 = 4305^2 + 1561^2 .

It is a zygodrome in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106891 + ... + 107086.

Almost surely, 2^20969746 is an apocalyptic number.

20969746 is a deficient number, since it is larger than the sum of its proper divisors (15620492).

20969746 is a wasteful number, since it uses less digits than its factorization.

20969746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213993 (or 213986 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 20969746 is about 4579.2735231694. The cubic root of 20969746 is about 275.7598642928.

The spelling of 20969746 in words is "twenty million, nine hundred sixty-nine thousand, seven hundred forty-six".