20347873 has 16 divisors (see below), whose sum is σ = 25854976. Its totient is φ = 15577920.

The previous prime is 20347867. The next prime is 20347883. The reversal of 20347873 is 37874302.

It is a cyclic number.

It is not a de Polignac number, because 20347873 - 2⁹ = 20347361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20347843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786 + ... + 6427.

It is an arithmetic number, because the mean of its divisors is an integer number (1615936).

Almost surely, 2^20347873 is an apocalyptic number.

It is an amenable number.

20347873 is a deficient number, since it is larger than the sum of its proper divisors (5507103).

20347873 is a wasteful number, since it uses less digits than its factorization.

20347873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7264.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 20347873 is about 4510.8616693488. The cubic root of 20347873 is about 273.0065118512.

The spelling of 20347873 in words is "twenty million, three hundred forty-seven thousand, eight hundred seventy-three".