20051451 has 24 divisors (see below), whose sum is σ = 34171904. Its totient is φ = 11087280.

The previous prime is 20051431. The next prime is 20051453. The reversal of 20051451 is 15415002.

It is not a de Polignac number, because 20051451 - 2¹³ = 20043259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20051453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3181 + ... + 7086.

Almost surely, 2^20051451 is an apocalyptic number.

20051451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20051451 is a deficient number, since it is larger than the sum of its proper divisors (14120453).

20051451 is a wasteful number, since it uses less digits than its factorization.

20051451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10311 (or 10308 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 20051451 is about 4477.8846568441. The cubic root of 20051451 is about 271.6743281783.

Adding to 20051451 its reverse (15415002), we get a palindrome (35466453).

It can be divided in two parts, 20051 and 451, that added together give a palindrome (20502).

The spelling of 20051451 in words is "twenty million, fifty-one thousand, four hundred fifty-one".