20340377 has 4 divisors (see below), whose sum is σ = 20349456. Its totient is φ = 20331300.

The previous prime is 20340373. The next prime is 20340391. The reversal of 20340377 is 77304302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 77304302 = 2 ⋅38652151.

It is a cyclic number.

It is not a de Polignac number, because 20340377 - 2² = 20340373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1502 + ... + 6552.

It is an arithmetic number, because the mean of its divisors is an integer number (5087364).

Almost surely, 2^20340377 is an apocalyptic number.

It is an amenable number.

20340377 is a deficient number, since it is larger than the sum of its proper divisors (9079).

20340377 is an equidigital number, since it uses as much as digits as its factorization.

20340377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9078.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 20340377 is about 4510.0307094298. The cubic root of 20340377 is about 272.9729832335.

Adding to 20340377 its reverse (77304302), we get a palindrome (97644679).

The spelling of 20340377 in words is "twenty million, three hundred forty thousand, three hundred seventy-seven".