20473801 has 4 divisors (see below), whose sum is σ = 20973204. Its totient is φ = 19974400.

The previous prime is 20473787. The next prime is 20473823. The reversal of 20473801 is 10837402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10837402 = 2 ⋅5418701.

It can be written as a sum of positive squares in 2 ways, for example, as 1157776 + 19316025 = 1076^2 + 4395^2 .

It is a cyclic number.

It is not a de Polignac number, because 20473801 - 2⁵ = 20473769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20473301) 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, 249640 + ... + 249721.

It is an arithmetic number, because the mean of its divisors is an integer number (5243301).

Almost surely, 2^20473801 is an apocalyptic number.

It is an amenable number.

20473801 is a deficient number, since it is larger than the sum of its proper divisors (499403).

20473801 is an equidigital number, since it uses as much as digits as its factorization.

20473801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499402.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20473801 is about 4524.7984485499. The cubic root of 20473801 is about 273.5685441491.

The spelling of 20473801 in words is "twenty million, four hundred seventy-three thousand, eight hundred one".