20412616 has 64 divisors (see below), whose sum is σ = 45936000. Its totient is φ = 8495424.

The previous prime is 20412599. The next prime is 20412647. The reversal of 20412616 is 61621402.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 117906 + ... + 118078.

It is an arithmetic number, because the mean of its divisors is an integer number (717750).

Almost surely, 2^20412616 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 20412616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22968000).

20412616 is an abundant number, since it is smaller than the sum of its proper divisors (25523384).

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

20412616 is a wasteful number, since it uses less digits than its factorization.

20412616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20412616 is about 4518.0323150681. The cubic root of 20412616 is about 273.2957566164.

The spelling of 20412616 in words is "twenty million, four hundred twelve thousand, six hundred sixteen".