20417542 has 8 divisors (see below), whose sum is σ = 30666600. Its totient is φ = 10195344.

The previous prime is 20417539. The next prime is 20417567. The reversal of 20417542 is 24571402.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4692 + ... + 7927.

It is an arithmetic number, because the mean of its divisors is an integer number (3833325).

Almost surely, 2^20417542 is an apocalyptic number.

20417542 is a deficient number, since it is larger than the sum of its proper divisors (10249058).

20417542 is a wasteful number, since it uses less digits than its factorization.

20417542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13430.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20417542 is about 4518.5774310064. The cubic root of 20417542 is about 273.3177388816.

Adding to 20417542 its reverse (24571402), we get a palindrome (44988944).

The spelling of 20417542 in words is "twenty million, four hundred seventeen thousand, five hundred forty-two".