20416539 has 16 divisors (see below), whose sum is σ = 31981824. Its totient is φ = 11421600.

The previous prime is 20416457. The next prime is 20416549. The reversal of 20416539 is 93561402.

It is not a de Polignac number, because 20416539 - 2¹⁷ = 20285467 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 23367 + ... + 24224.

It is an arithmetic number, because the mean of its divisors is an integer number (1998864).

Almost surely, 2^20416539 is an apocalyptic number.

20416539 is a deficient number, since it is larger than the sum of its proper divisors (11565285).

20416539 is a wasteful number, since it uses less digits than its factorization.

20416539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47618.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20416539 is about 4518.4664433854. The cubic root of 20416539 is about 273.3132632828.

The spelling of 20416539 in words is "twenty million, four hundred sixteen thousand, five hundred thirty-nine".