20724612 has 12 divisors (see below), whose sum is σ = 48357456. Its totient is φ = 6908200.

The previous prime is 20724601. The next prime is 20724617. The reversal of 20724612 is 21642702.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20724617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863514 + ... + 863537.

It is an arithmetic number, because the mean of its divisors is an integer number (4029788).

Almost surely, 2^20724612 is an apocalyptic number.

It is an amenable number.

20724612 is an abundant number, since it is smaller than the sum of its proper divisors (27632844).

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

20724612 is a wasteful number, since it uses less digits than its factorization.

20724612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727058 (or 1727056 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20724612 is about 4552.4292416247. The cubic root of 20724612 is about 274.6811157709.

The spelling of 20724612 in words is "twenty million, seven hundred twenty-four thousand, six hundred twelve".