20416542 has 16 divisors (see below), whose sum is σ = 41018880. Its totient is φ = 6774552.

The previous prime is 20416457. The next prime is 20416549. The reversal of 20416542 is 24561402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20416549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6292 + ... + 8967.

It is an arithmetic number, because the mean of its divisors is an integer number (2563680).

Almost surely, 2^20416542 is an apocalyptic number.

20416542 is an abundant number, since it is smaller than the sum of its proper divisors (20602338).

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

20416542 is a wasteful number, since it uses less digits than its factorization.

20416542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15487.

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

The square root of 20416542 is about 4518.4667753564. The cubic root of 20416542 is about 273.3132766696.

Adding to 20416542 its reverse (24561402), we get a palindrome (44977944).

The spelling of 20416542 in words is "twenty million, four hundred sixteen thousand, five hundred forty-two".