20344693 has 4 divisors (see below), whose sum is σ = 20500128. Its totient is φ = 20189260.

The previous prime is 20344691. The next prime is 20344703. The reversal of 20344693 is 39644302.

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 20344693 - 2¹ = 20344691 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344691) 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, 77521 + ... + 77782.

It is an arithmetic number, because the mean of its divisors is an integer number (5125032).

Almost surely, 2^20344693 is an apocalyptic number.

It is an amenable number.

20344693 is a deficient number, since it is larger than the sum of its proper divisors (155435).

20344693 is a wasteful number, since it uses less digits than its factorization.

20344693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155434.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 20344693 is about 4510.5091730314. The cubic root of 20344693 is about 272.9922891371.

Adding to 20344693 its reverse (39644302), we get a palindrome (59988995).

The spelling of 20344693 in words is "twenty million, three hundred forty-four thousand, six hundred ninety-three".