20612867 has 8 divisors (see below), whose sum is σ = 23010240. Its totient is φ = 18302760.

The previous prime is 20612863. The next prime is 20612869. The reversal of 20612867 is 76821602.

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 20612867 - 2² = 20612863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20612863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21317 + ... + 22262.

It is an arithmetic number, because the mean of its divisors is an integer number (2876280).

Almost surely, 2^20612867 is an apocalyptic number.

20612867 is a deficient number, since it is larger than the sum of its proper divisors (2397373).

20612867 is a wasteful number, since it uses less digits than its factorization.

20612867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43633.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20612867 is about 4540.1395353006. The cubic root of 20612867 is about 274.1865415923.

The spelling of 20612867 in words is "twenty million, six hundred twelve thousand, eight hundred sixty-seven".