20542011 has 16 divisors (see below), whose sum is σ = 31609344. Its totient is φ = 11623104.

The previous prime is 20542009. The next prime is 20542051. The reversal of 20542011 is 11024502.

It is not a de Polignac number, because 20542011 - 2¹ = 20542009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20542051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2586 + ... + 6911.

It is an arithmetic number, because the mean of its divisors is an integer number (1975584).

Almost surely, 2^20542011 is an apocalyptic number.

20542011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20542011 is a deficient number, since it is larger than the sum of its proper divisors (11067333).

20542011 is a wasteful number, since it uses less digits than its factorization.

20542011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9610.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20542011 is about 4532.3295334739. The cubic root of 20542011 is about 273.8720120810.

Adding to 20542011 its reverse (11024502), we get a palindrome (31566513).

The spelling of 20542011 in words is "twenty million, five hundred forty-two thousand, eleven".