20969766 has 20 divisors (see below), whose sum is σ = 46988172. Its totient is φ = 6989868.

The previous prime is 20969723. The next prime is 20969783. The reversal of 20969766 is 66796902.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 64560 + ... + 64883.

Almost surely, 2^20969766 is an apocalyptic number.

20969766 is an abundant number, since it is smaller than the sum of its proper divisors (26018406).

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

20969766 is a wasteful number, since it uses less digits than its factorization.

20969766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129457 (or 129448 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 20969766 is about 4579.2757069213. The cubic root of 20969766 is about 275.7599519619.

The spelling of 20969766 in words is "twenty million, nine hundred sixty-nine thousand, seven hundred sixty-six".