20305401 has 8 divisors (see below), whose sum is σ = 27216384. Its totient is φ = 13465680.

The previous prime is 20305391. The next prime is 20305409. The reversal of 20305401 is 10450302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20305401 - 2¹³ = 20297209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20305409) 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, 17146 + ... + 18291.

It is an arithmetic number, because the mean of its divisors is an integer number (3402048).

Almost surely, 2^20305401 is an apocalyptic number.

It is an amenable number.

20305401 is a deficient number, since it is larger than the sum of its proper divisors (6910983).

20305401 is a wasteful number, since it uses less digits than its factorization.

20305401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35631.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20305401 is about 4506.1514621681. The cubic root of 20305401 is about 272.8164312234.

Adding to 20305401 its reverse (10450302), we get a palindrome (30755703).

It can be divided in two parts, 20305 and 401, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 20305401 in words is "twenty million, three hundred five thousand, four hundred one".