20235401 has 4 divisors (see below), whose sum is σ = 20246292. Its totient is φ = 20224512.

The previous prime is 20235373. The next prime is 20235403. The reversal of 20235401 is 10453202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15217801 + 5017600 = 3901^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 20235401 - 2¹⁰ = 20234377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20235401.

It is not an unprimeable number, because it can be changed into a prime (20235403) 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, 1880 + ... + 6633.

It is an arithmetic number, because the mean of its divisors is an integer number (5061573).

Almost surely, 2^20235401 is an apocalyptic number.

It is an amenable number.

20235401 is a deficient number, since it is larger than the sum of its proper divisors (10891).

20235401 is an equidigital number, since it uses as much as digits as its factorization.

20235401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10890.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20235401 is about 4498.3775964230. The cubic root of 20235401 is about 272.5025715887.

Adding to 20235401 its reverse (10453202), we get a palindrome (30688603).

The spelling of 20235401 in words is "twenty million, two hundred thirty-five thousand, four hundred one".