20969316 has 36 divisors (see below), whose sum is σ = 53189500. Its totient is φ = 6965568.

The previous prime is 20969309. The next prime is 20969321. The reversal of 20969316 is 61396902.

It can be written as a sum of positive squares in 2 ways, for example, as 13351716 + 7617600 = 3654^2 + 2760^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11730 + ... + 13398.

Almost surely, 2^20969316 is an apocalyptic number.

It is an amenable number.

20969316 is an abundant number, since it is smaller than the sum of its proper divisors (32220184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20969316 is a wasteful number, since it uses less digits than its factorization.

20969316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028 (or 2023 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 20969316 is about 4579.2265722499. The cubic root of 20969316 is about 275.7579793939.

The spelling of 20969316 in words is "twenty million, nine hundred sixty-nine thousand, three hundred sixteen".