20516442 has 8 divisors (see below), whose sum is σ = 41032896. Its totient is φ = 6838812.

The previous prime is 20516423. The next prime is 20516471. The reversal of 20516442 is 24461502.

It is a sphenic number, since it is the product of 3 distinct primes.

20516442 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709698 + ... + 1709709.

It is an arithmetic number, because the mean of its divisors is an integer number (5129112).

Almost surely, 2^20516442 is an apocalyptic number.

20516442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20516442 is a wasteful number, since it uses less digits than its factorization.

20516442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419412.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20516442 is about 4529.5079202933. The cubic root of 20516442 is about 273.7583338094.

Adding to 20516442 its reverse (24461502), we get a palindrome (44977944).

The spelling of 20516442 in words is "twenty million, five hundred sixteen thousand, four hundred forty-two".