20344749 has 8 divisors (see below), whose sum is σ = 27703680. Its totient is φ = 13274496.

The previous prime is 20344703. The next prime is 20344759. The reversal of 20344749 is 94744302.

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

It is not a de Polignac number, because 20344749 - 2¹¹ = 20342701 is a prime.

It is a super-3 number, since 3×20344749³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344759) 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, 72004 + ... + 72285.

It is an arithmetic number, because the mean of its divisors is an integer number (3462960).

Almost surely, 2^20344749 is an apocalyptic number.

It is an amenable number.

20344749 is a deficient number, since it is larger than the sum of its proper divisors (7358931).

20344749 is a wasteful number, since it uses less digits than its factorization.

20344749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144339.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 20344749 is about 4510.5153807520. The cubic root of 20344749 is about 272.9925396128.

The spelling of 20344749 in words is "twenty million, three hundred forty-four thousand, seven hundred forty-nine".