20545377 has 4 divisors (see below), whose sum is σ = 27393840. Its totient is φ = 13696916.

The previous prime is 20545363. The next prime is 20545379. The reversal of 20545377 is 77354502.

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.

It is a cyclic number.

It is not a de Polignac number, because 20545377 - 2¹⁴ = 20528993 is a prime.

It is a super-2 number, since 2×20545377² = 844225032144258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20545379) 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, 3424227 + ... + 3424232.

It is an arithmetic number, because the mean of its divisors is an integer number (6848460).

Almost surely, 2^20545377 is an apocalyptic number.

It is an amenable number.

20545377 is a deficient number, since it is larger than the sum of its proper divisors (6848463).

20545377 is an equidigital number, since it uses as much as digits as its factorization.

20545377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6848462.

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 20545377 is about 4532.7008504864. The cubic root of 20545377 is about 273.8869700915.

Adding to 20545377 its reverse (77354502), we get a palindrome (97899879).

The spelling of 20545377 in words is "twenty million, five hundred forty-five thousand, three hundred seventy-seven".