20346764 has 6 divisors (see below), whose sum is σ = 35606844. Its totient is φ = 10173380.

The previous prime is 20346763. The next prime is 20346769. The reversal of 20346764 is 46764302.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20346764.

It is not an unprimeable number, because it can be changed into a prime (20346763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2543342 + ... + 2543349.

It is an arithmetic number, because the mean of its divisors is an integer number (5934474).

Almost surely, 2^20346764 is an apocalyptic number.

It is an amenable number.

20346764 is a deficient number, since it is larger than the sum of its proper divisors (15260080).

20346764 is a wasteful number, since it uses less digits than its factorization.

20346764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5086695 (or 5086693 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 20346764 is about 4510.7387421574. The cubic root of 20346764 is about 273.0015519598.

The spelling of 20346764 in words is "twenty million, three hundred forty-six thousand, seven hundred sixty-four".