20450016 has 48 divisors (see below), whose sum is σ = 59648400. Its totient is φ = 6816384.

The previous prime is 20450009. The next prime is 20450033. The reversal of 20450016 is 61005402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10971 + ... + 12698.

It is an arithmetic number, because the mean of its divisors is an integer number (1242675).

Almost surely, 2^20450016 is an apocalyptic number.

It is an amenable number.

20450016 is an abundant number, since it is smaller than the sum of its proper divisors (39198384).

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

20450016 is a wasteful number, since it uses less digits than its factorization.

20450016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23688 (or 23674 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20450016 is about 4522.1693909008. The cubic root of 20450016 is about 273.4625656325.

Adding to 20450016 its reverse (61005402), we get a palindrome (81455418).

The spelling of 20450016 in words is "twenty million, four hundred fifty thousand, sixteen".