20860073 has 4 divisors (see below), whose sum is σ = 22464708. Its totient is φ = 19255440.

The previous prime is 20860067. The next prime is 20860097. The reversal of 20860073 is 37006802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7118224 + 13741849 = 2668^2 + 3707^2 .

It is a cyclic number.

It is not a de Polignac number, because 20860073 - 2¹⁴ = 20843689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20860033) 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 3 ways as a sum of consecutive naturals, for example, 802298 + ... + 802323.

It is an arithmetic number, because the mean of its divisors is an integer number (5616177).

Almost surely, 2^20860073 is an apocalyptic number.

It is an amenable number.

20860073 is a deficient number, since it is larger than the sum of its proper divisors (1604635).

20860073 is a wasteful number, since it uses less digits than its factorization.

20860073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604634.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20860073 is about 4567.2828902970. The cubic root of 20860073 is about 275.2782769897.

Adding to 20860073 its reverse (37006802), we get a palindrome (57866875).

The spelling of 20860073 in words is "twenty million, eight hundred sixty thousand, seventy-three".