20946436 has 24 divisors (see below), whose sum is σ = 44098880. Its totient is φ = 8504352.

The previous prime is 20946433. The next prime is 20946451. The reversal of 20946436 is 63464902.

It is a super-2 number, since 2×20946436² = 877506362204192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20946433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19155 + ... + 20218.

Almost surely, 2^20946436 is an apocalyptic number.

It is an amenable number.

20946436 is an abundant number, since it is smaller than the sum of its proper divisors (23152444).

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

20946436 is a wasteful number, since it uses less digits than its factorization.

20946436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39403 (or 39401 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 20946436 is about 4576.7276519365. The cubic root of 20946436 is about 275.6576480541.

The spelling of 20946436 in words is "twenty million, nine hundred forty-six thousand, four hundred thirty-six".