20542416 has 20 divisors (see below), whose sum is σ = 53068032. Its totient is φ = 6847456.

The previous prime is 20542399. The next prime is 20542447. The reversal of 20542416 is 61424502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 213936 + ... + 214031.

Almost surely, 2^20542416 is an apocalyptic number.

It is an amenable number.

20542416 is an abundant number, since it is smaller than the sum of its proper divisors (32525616).

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

20542416 is a wasteful number, since it uses less digits than its factorization.

20542416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427978 (or 427972 counting only the distinct ones).

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

The square root of 20542416 is about 4532.3742122645. The cubic root of 20542416 is about 273.8738119281.

Adding to 20542416 its reverse (61424502), we get a palindrome (81966918).

The spelling of 20542416 in words is "twenty million, five hundred forty-two thousand, four hundred sixteen".