20345401 has 4 divisors (see below), whose sum is σ = 20360704. Its totient is φ = 20330100.

The previous prime is 20345359. The next prime is 20345411. The reversal of 20345401 is 10454302.

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 20345401 - 2¹⁷ = 20214329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345411) 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, 5445 + ... + 8386.

It is an arithmetic number, because the mean of its divisors is an integer number (5090176).

Almost surely, 2^20345401 is an apocalyptic number.

It is an amenable number.

20345401 is a deficient number, since it is larger than the sum of its proper divisors (15303).

20345401 is a wasteful number, since it uses less digits than its factorization.

20345401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15302.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20345401 is about 4510.5876557274. The cubic root of 20345401 is about 272.9954558319.

Adding to 20345401 its reverse (10454302), we get a palindrome (30799703).

The spelling of 20345401 in words is "twenty million, three hundred forty-five thousand, four hundred one".