20445976 has 16 divisors (see below), whose sum is σ = 40354200. Its totient is φ = 9684864.

The previous prime is 20445973. The next prime is 20445979. The reversal of 20445976 is 67954402.

It is an interprime number because it is at equal distance from previous prime (20445973) and next prime (20445979).

It is a super-3 number, since 3×20445976³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445973) 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, 67105 + ... + 67408.

Almost surely, 2^20445976 is an apocalyptic number.

It is an amenable number.

20445976 is a deficient number, since it is larger than the sum of its proper divisors (19908224).

20445976 is a wasteful number, since it uses less digits than its factorization.

20445976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134538 (or 134534 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 20445976 is about 4521.7226805721. The cubic root of 20445976 is about 273.4445564938. Note that the first 3 decimals are identical.

The spelling of 20445976 in words is "twenty million, four hundred forty-five thousand, nine hundred seventy-six".