20448351 has 48 divisors (see below), whose sum is σ = 38787840. Its totient is φ = 10056960.

The previous prime is 20448347. The next prime is 20448353. The reversal of 20448351 is 15384402.

It is not a de Polignac number, because 20448351 - 2² = 20448347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20448353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12391 + ... + 13943.

It is an arithmetic number, because the mean of its divisors is an integer number (808080).

Almost surely, 2^20448351 is an apocalyptic number.

20448351 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20448351 is a deficient number, since it is larger than the sum of its proper divisors (18339489).

20448351 is a wasteful number, since it uses less digits than its factorization.

20448351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 1593 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20448351 is about 4521.9852940937. The cubic root of 20448351 is about 273.4551438367.

The spelling of 20448351 in words is "twenty million, four hundred forty-eight thousand, three hundred fifty-one".