20249836 has 6 divisors (see below), whose sum is σ = 35437220. Its totient is φ = 10124916.

The previous prime is 20249819. The next prime is 20249837. The reversal of 20249836 is 63894202.

It is not an unprimeable number, because it can be changed into a prime (20249837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2531226 + ... + 2531233.

Almost surely, 2^20249836 is an apocalyptic number.

It is an amenable number.

20249836 is a deficient number, since it is larger than the sum of its proper divisors (15187384).

20249836 is a wasteful number, since it uses less digits than its factorization.

20249836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062463 (or 5062461 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 20249836 is about 4499.9817777409. The cubic root of 20249836 is about 272.5673531012.

The spelling of 20249836 in words is "twenty million, two hundred forty-nine thousand, eight hundred thirty-six".