20502011 has 8 divisors (see below), whose sum is σ = 21003840. Its totient is φ = 20003008.

The previous prime is 20501989. The next prime is 20502019. The reversal of 20502011 is 11020502.

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

It is a cyclic number.

It is not a de Polignac number, because 20502011 - 2¹⁴ = 20485627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20501983 and 20502001.

It is not an unprimeable number, because it can be changed into a prime (20502019) 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, 23495 + ... + 24351.

It is an arithmetic number, because the mean of its divisors is an integer number (2625480).

Almost surely, 2^20502011 is an apocalyptic number.

20502011 is a deficient number, since it is larger than the sum of its proper divisors (501829).

20502011 is an equidigital number, since it uses as much as digits as its factorization.

20502011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 20502011 is about 4527.9146414216. The cubic root of 20502011 is about 273.6941327303.

Adding to 20502011 its reverse (11020502), we get a palindrome (31522513).

The spelling of 20502011 in words is "twenty million, five hundred two thousand, eleven".