20346216 has 32 divisors (see below), whose sum is σ = 55490400. Its totient is φ = 6165440.

The previous prime is 20346211. The next prime is 20346247. The reversal of 20346216 is 61264302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20346211) 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, 38271 + ... + 38798.

It is an arithmetic number, because the mean of its divisors is an integer number (1734075).

Almost surely, 2^20346216 is an apocalyptic number.

It is an amenable number.

20346216 is an abundant number, since it is smaller than the sum of its proper divisors (35144184).

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

20346216 is a wasteful number, since it uses less digits than its factorization.

20346216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77089 (or 77085 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20346216 is about 4510.6779978181. The cubic root of 20346216 is about 272.9991010181. Note that the first 3 decimals are identical.

The spelling of 20346216 in words is "twenty million, three hundred forty-six thousand, two hundred sixteen".