20345744 has 10 divisors (see below), whose sum is σ = 39419910. Its totient is φ = 10172864.

The previous prime is 20345723. The next prime is 20345747. The reversal of 20345744 is 44754302.

It can be written as a sum of positive squares in only one way, i.e., 12166144 + 8179600 = 3488^2 + 2860^2 .

It is not an unprimeable number, because it can be changed into a prime (20345747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635789 + ... + 635820.

It is an arithmetic number, because the mean of its divisors is an integer number (3941991).

Almost surely, 2^20345744 is an apocalyptic number.

It is an amenable number.

20345744 is a deficient number, since it is larger than the sum of its proper divisors (19074166).

20345744 is a wasteful number, since it uses less digits than its factorization.

20345744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271617 (or 1271611 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 20345744 is about 4510.6256772204. The cubic root of 20345744 is about 272.9969899528.

The spelling of 20345744 in words is "twenty million, three hundred forty-five thousand, seven hundred forty-four".