20969236 has 12 divisors (see below), whose sum is σ = 38627680. Its totient is φ = 9932760.

The previous prime is 20969231. The next prime is 20969239. The reversal of 20969236 is 63296902.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20969195 and 20969204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20969231) 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, 137880 + ... + 138031.

Almost surely, 2^20969236 is an apocalyptic number.

It is an amenable number.

20969236 is a deficient number, since it is larger than the sum of its proper divisors (17658444).

20969236 is a wasteful number, since it uses less digits than its factorization.

20969236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275934 (or 275932 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 20969236 is about 4579.2178371421. The cubic root of 20969236 is about 275.7576287122.

The spelling of 20969236 in words is "twenty million, nine hundred sixty-nine thousand, two hundred thirty-six".