20395746 has 64 divisors (see below), whose sum is σ = 52531200. Its totient is φ = 5745168.

The previous prime is 20395741. The next prime is 20395747. The reversal of 20395746 is 64759302.

It is a self number, because there is not a number n which added to its sum of digits gives 20395746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20395741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29521 + ... + 30203.

It is an arithmetic number, because the mean of its divisors is an integer number (820800).

Almost surely, 2^20395746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20395746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26265600).

20395746 is an abundant number, since it is smaller than the sum of its proper divisors (32135454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20395746 is a wasteful number, since it uses less digits than its factorization.

20395746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20395746 is about 4516.1649659861. The cubic root of 20395746 is about 273.2204474691.

The spelling of 20395746 in words is "twenty million, three hundred ninety-five thousand, seven hundred forty-six".