20012451 has 16 divisors (see below), whose sum is σ = 28576800. Its totient is φ = 12412928.

The previous prime is 20012441. The next prime is 20012479. The reversal of 20012451 is 15421002.

It is a cyclic number.

It is not a de Polignac number, because 20012451 - 2¹⁹ = 19488163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012451.

It is not an unprimeable number, because it can be changed into a prime (20012401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2335 + ... + 6743.

It is an arithmetic number, because the mean of its divisors is an integer number (1786050).

Almost surely, 2^20012451 is an apocalyptic number.

20012451 is a deficient number, since it is larger than the sum of its proper divisors (8564349).

20012451 is a wasteful number, since it uses less digits than its factorization.

20012451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20012451 is about 4473.5278025290. The cubic root of 20012451 is about 271.4980786640.

Adding to 20012451 its reverse (15421002), we get a palindrome (35433453).

The spelling of 20012451 in words is "twenty million, twelve thousand, four hundred fifty-one".