20470073 has 8 divisors (see below), whose sum is σ = 22159368. Its totient is φ = 18797184.

The previous prime is 20470061. The next prime is 20470097. The reversal of 20470073 is 37007402.

It can be written as a sum of positive squares in 4 ways, for example, as 1530169 + 18939904 = 1237^2 + 4352^2 .

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 20470073 - 2¹⁰ = 20469049 is a prime.

It is a super-5 number, since 5×20470073⁵ (a number of 38 digits) contains 55555 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20470573) 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, 1436 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (2769921).

Almost surely, 2^20470073 is an apocalyptic number.

It is an amenable number.

20470073 is a deficient number, since it is larger than the sum of its proper divisors (1689295).

20470073 is a wasteful number, since it uses less digits than its factorization.

20470073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8203.

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 20470073 is about 4524.3864777448. The cubic root of 20470073 is about 273.5519387739.

Adding to 20470073 its reverse (37007402), we get a palindrome (57477475).

The spelling of 20470073 in words is "twenty million, four hundred seventy thousand, seventy-three".