20542371 has 8 divisors (see below), whose sum is σ = 27411024. Its totient is φ = 13684320.

The previous prime is 20542349. The next prime is 20542373. The reversal of 20542371 is 17324502.

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

It is not a de Polignac number, because 20542371 - 2¹⁰ = 20541347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20542373) 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, 5181 + ... + 8241.

It is an arithmetic number, because the mean of its divisors is an integer number (3426378).

Almost surely, 2^20542371 is an apocalyptic number.

20542371 is a deficient number, since it is larger than the sum of its proper divisors (6868653).

20542371 is a wasteful number, since it uses less digits than its factorization.

20542371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5301.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20542371 is about 4532.3692479762. The cubic root of 20542371 is about 273.8736119463.

Adding to 20542371 its reverse (17324502), we get a palindrome (37866873).

The spelling of 20542371 in words is "twenty million, five hundred forty-two thousand, three hundred seventy-one".