20346630 has 16 divisors (see below), whose sum is σ = 48831984. Its totient is φ = 5425760.

The previous prime is 20346617. The next prime is 20346631. The reversal of 20346630 is 3664302.

It is a self number, because there is not a number n which added to its sum of digits gives 20346630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20346631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339081 + ... + 339140.

It is an arithmetic number, because the mean of its divisors is an integer number (3051999).

Almost surely, 2^20346630 is an apocalyptic number.

20346630 is an abundant number, since it is smaller than the sum of its proper divisors (28485354).

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

20346630 is a wasteful number, since it uses less digits than its factorization.

20346630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678231.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 20346630 is about 4510.7238886902. The cubic root of 20346630 is about 273.0009526460. Note that the first 3 decimals are identical.

The spelling of 20346630 in words is "twenty million, three hundred forty-six thousand, six hundred thirty".