20349612 has 72 divisors (see below), whose sum is σ = 55862352. Its totient is φ = 6220800.

The previous prime is 20349611. The next prime is 20349613. The reversal of 20349612 is 21694302.

20349612 is a `hidden beast` number, since 2 + 0 + 3 + 49 + 612 = 666.

It is an interprime number because it is at equal distance from previous prime (20349611) and next prime (20349613).

It is not an unprimeable number, because it can be changed into a prime (20349611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24687 + ... + 25497.

It is an arithmetic number, because the mean of its divisors is an integer number (775866).

Almost surely, 2^20349612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20349612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27931176).

20349612 is an abundant number, since it is smaller than the sum of its proper divisors (35512740).

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

20349612 is a wasteful number, since it uses less digits than its factorization.

20349612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20349612 is about 4511.0544221944. The cubic root of 20349612 is about 273.0142889917.

The spelling of 20349612 in words is "twenty million, three hundred forty-nine thousand, six hundred twelve".