20555467 has 4 divisors (see below), whose sum is σ = 20943360. Its totient is φ = 20167576.

The previous prime is 20555453. The next prime is 20555477. The reversal of 20555467 is 76455502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76455502 = 2 ⋅38227751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20555467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20555407) 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, 193867 + ... + 193972.

It is an arithmetic number, because the mean of its divisors is an integer number (5235840).

Almost surely, 2^20555467 is an apocalyptic number.

20555467 is a deficient number, since it is larger than the sum of its proper divisors (387893).

20555467 is an equidigital number, since it uses as much as digits as its factorization.

20555467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387892.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 20555467 is about 4533.8137368004. The cubic root of 20555467 is about 273.9317987855.

The spelling of 20555467 in words is "twenty million, five hundred fifty-five thousand, four hundred sixty-seven".