20451448 has 32 divisors (see below), whose sum is σ = 40669200. Its totient is φ = 9614592.

The previous prime is 20451443. The next prime is 20451451. The reversal of 20451448 is 84415402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23436 + ... + 24292.

Almost surely, 2^20451448 is an apocalyptic number.

It is an amenable number.

20451448 is a deficient number, since it is larger than the sum of its proper divisors (20217752).

20451448 is a wasteful number, since it uses less digits than its factorization.

20451448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 20451448 is about 4522.3277192172. The cubic root of 20451448 is about 273.4689485005.

The spelling of 20451448 in words is "twenty million, four hundred fifty-one thousand, four hundred forty-eight".