20340877 has 4 divisors (see below), whose sum is σ = 20674396. Its totient is φ = 20007360.

The previous prime is 20340871. The next prime is 20340907. The reversal of 20340877 is 77804302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77804302 = 2 ⋅38902151.

It can be written as a sum of positive squares in 2 ways, for example, as 10569001 + 9771876 = 3251^2 + 3126^2 .

It is a cyclic number.

It is not a de Polignac number, because 20340877 - 2³ = 20340869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340871) 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 3 ways as a sum of consecutive naturals, for example, 166668 + ... + 166789.

It is an arithmetic number, because the mean of its divisors is an integer number (5168599).

Almost surely, 2^20340877 is an apocalyptic number.

It is an amenable number.

20340877 is a deficient number, since it is larger than the sum of its proper divisors (333519).

20340877 is an equidigital number, since it uses as much as digits as its factorization.

20340877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333518.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 20340877 is about 4510.0861410842. The cubic root of 20340877 is about 272.9752199238.

The spelling of 20340877 in words is "twenty million, three hundred forty thousand, eight hundred seventy-seven".