20920167 has 8 divisors (see below), whose sum is σ = 30992880. Its totient is φ = 13946760.

The previous prime is 20920157. The next prime is 20920181. The reversal of 20920167 is 76102902.

It is not a de Polignac number, because 20920167 - 2⁶ = 20920103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 774821 = 20920167 / (2 + 0 + 9 + 2 + 0 + 1 + 6 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 20920167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20920117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387384 + ... + 387437.

It is an arithmetic number, because the mean of its divisors is an integer number (3874110).

Almost surely, 2^20920167 is an apocalyptic number.

20920167 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20920167 is a deficient number, since it is larger than the sum of its proper divisors (10072713).

20920167 is an equidigital number, since it uses as much as digits as its factorization.

20920167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774830 (or 774824 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20920167 is about 4573.8569063756. The cubic root of 20920167 is about 275.5423654358.

The spelling of 20920167 in words is "twenty million, nine hundred twenty thousand, one hundred sixty-seven".