20131451 has 12 divisors (see below), whose sum is σ = 21919800. Its totient is φ = 18474240.

The previous prime is 20131427. The next prime is 20131487. The reversal of 20131451 is 15413102.

It is not a de Polignac number, because 20131451 - 2⁶ = 20131387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (20181451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11000 + ... + 12698.

It is an arithmetic number, because the mean of its divisors is an integer number (1826650).

Almost surely, 2^20131451 is an apocalyptic number.

20131451 is a deficient number, since it is larger than the sum of its proper divisors (1788349).

20131451 is a wasteful number, since it uses less digits than its factorization.

20131451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20131451 is about 4486.8085539724. The cubic root of 20131451 is about 272.0351517070.

Adding to 20131451 its reverse (15413102), we get a palindrome (35544553).

The spelling of 20131451 in words is "twenty million, one hundred thirty-one thousand, four hundred fifty-one".