20071801 has 4 divisors (see below), whose sum is σ = 20944512. Its totient is φ = 19199092.

The previous prime is 20071783. The next prime is 20071811. The reversal of 20071801 is 10817002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20071801 - 2⁵ = 20071769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20071811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436321 + ... + 436366.

It is an arithmetic number, because the mean of its divisors is an integer number (5236128).

Almost surely, 2^20071801 is an apocalyptic number.

It is an amenable number.

20071801 is a deficient number, since it is larger than the sum of its proper divisors (872711).

20071801 is an equidigital number, since it uses as much as digits as its factorization.

20071801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872710.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 20071801 is about 4480.1563588786. The cubic root of 20071801 is about 271.7662035466.

Adding to 20071801 its reverse (10817002), we get a palindrome (30888803).

The spelling of 20071801 in words is "twenty million, seventy-one thousand, eight hundred one".