20147967 has 48 divisors (see below), whose sum is σ = 35303520. Its totient is φ = 11321856.

The previous prime is 20147947. The next prime is 20148041. The reversal of 20147967 is 76974102.

It is a happy number.

It is not a de Polignac number, because 20147967 - 2⁶ = 20147903 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147917) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128253 + ... + 128409.

It is an arithmetic number, because the mean of its divisors is an integer number (735490).

Almost surely, 2^20147967 is an apocalyptic number.

20147967 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20147967 is a deficient number, since it is larger than the sum of its proper divisors (15155553).

20147967 is a wasteful number, since it uses less digits than its factorization.

20147967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 20147967 is about 4488.6486830671. The cubic root of 20147967 is about 272.1095246280.

The spelling of 20147967 in words is "twenty million, one hundred forty-seven thousand, nine hundred sixty-seven".