20201967 has 30 divisors (see below), whose sum is σ = 32095008. Its totient is φ = 12661056.

The previous prime is 20201939. The next prime is 20201969. The reversal of 20201967 is 76910202.

It is not a de Polignac number, because 20201967 - 2⁸ = 20201711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20201967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201969) by changing a digit.

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 29 ways as a sum of consecutive naturals, for example, 22978 + ... + 23840.

Almost surely, 2^20201967 is an apocalyptic number.

20201967 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20201967 is a deficient number, since it is larger than the sum of its proper divisors (11893041).

20201967 is an equidigital number, since it uses as much as digits as its factorization.

20201967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 883 counting only the distinct ones).

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

The square root of 20201967 is about 4494.6598313999. The cubic root of 20201967 is about 272.3524078006.

The spelling of 20201967 in words is "twenty million, two hundred one thousand, nine hundred sixty-seven".