20446965 has 96 divisors (see below), whose sum is σ = 46293120. Its totient is φ = 8467200.

The previous prime is 20446961. The next prime is 20446969. The reversal of 20446965 is 56964402.

It is an interprime number because it is at equal distance from previous prime (20446961) and next prime (20446969).

It is not a de Polignac number, because 20446965 - 2² = 20446961 is a prime.

It is a super-2 number, since 2×20446965² = 836156755422450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20446961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 72625 + ... + 72905.

It is an arithmetic number, because the mean of its divisors is an integer number (482220).

Almost surely, 2^20446965 is an apocalyptic number.

It is an amenable number.

20446965 is an abundant number, since it is smaller than the sum of its proper divisors (25846155).

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

20446965 is a wasteful number, since it uses less digits than its factorization.

20446965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 20446965 is about 4521.8320402244. The cubic root of 20446965 is about 273.4489653859.

It can be divided in two parts, 2044 and 6965, that added together give a palindrome (9009).

The spelling of 20446965 in words is "twenty million, four hundred forty-six thousand, nine hundred sixty-five".