20734867 has 8 divisors (see below), whose sum is σ = 20985120. Its totient is φ = 20486400.

The previous prime is 20734853. The next prime is 20734919. The reversal of 20734867 is 76843702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20734867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20734267) 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 7 ways as a sum of consecutive naturals, for example, 53109 + ... + 53497.

It is an arithmetic number, because the mean of its divisors is an integer number (2623140).

Almost surely, 2^20734867 is an apocalyptic number.

20734867 is a deficient number, since it is larger than the sum of its proper divisors (250253).

20734867 is a wasteful number, since it uses less digits than its factorization.

20734867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 20734867 is about 4553.5554240615. Note that the first 3 decimals coincide. The cubic root of 20734867 is about 274.7264144132.

The spelling of 20734867 in words is "twenty million, seven hundred thirty-four thousand, eight hundred sixty-seven".