20167945 has 8 divisors (see below), whose sum is σ = 27658944. Its totient is φ = 13829424.

The previous prime is 20167913. The next prime is 20167951. The reversal of 20167945 is 54976102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20167945 - 2⁵ = 20167913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20167945.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 288079 + ... + 288148.

It is an arithmetic number, because the mean of its divisors is an integer number (3457368).

Almost surely, 2^20167945 is an apocalyptic number.

It is an amenable number.

20167945 is a deficient number, since it is larger than the sum of its proper divisors (7490999).

20167945 is an equidigital number, since it uses as much as digits as its factorization.

20167945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576239.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20167945 is about 4490.8735230465. The cubic root of 20167945 is about 272.1994329265.

It can be divided in two parts, 20167 and 945, that added together give a palindrome (21112).

The spelling of 20167945 in words is "twenty million, one hundred sixty-seven thousand, nine hundred forty-five".