20140651 has 4 divisors (see below), whose sum is σ = 20155072. Its totient is φ = 20126232.

The previous prime is 20140643. The next prime is 20140657. The reversal of 20140651 is 15604102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15604102 = 2 ⋅7802051.

It is a cyclic number.

It is not a de Polignac number, because 20140651 - 2³ = 20140643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20140657) 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 3 ways as a sum of consecutive naturals, for example, 4860 + ... + 7993.

It is an arithmetic number, because the mean of its divisors is an integer number (5038768).

Almost surely, 2^20140651 is an apocalyptic number.

20140651 is a deficient number, since it is larger than the sum of its proper divisors (14421).

20140651 is a wasteful number, since it uses less digits than its factorization.

20140651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14420.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20140651 is about 4487.8336644755. The cubic root of 20140651 is about 272.0765850882.

Adding to 20140651 its reverse (15604102), we get a palindrome (35744753).

The spelling of 20140651 in words is "twenty million, one hundred forty thousand, six hundred fifty-one".