20547967 has 8 divisors (see below), whose sum is σ = 22723920. Its totient is φ = 18423360.

The previous prime is 20547931. The next prime is 20547973. The reversal of 20547967 is 76974502.

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

It is a cyclic number.

It is not a de Polignac number, because 20547967 - 2¹¹ = 20545919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20547997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11992 + ... + 13597.

It is an arithmetic number, because the mean of its divisors is an integer number (2840490).

Almost surely, 2^20547967 is an apocalyptic number.

20547967 is a deficient number, since it is larger than the sum of its proper divisors (2175953).

20547967 is a wasteful number, since it uses less digits than its factorization.

20547967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25673.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 20547967 is about 4532.9865431082. The cubic root of 20547967 is about 273.8984785596.

The spelling of 20547967 in words is "twenty million, five hundred forty-seven thousand, nine hundred sixty-seven".