20502066 has 24 divisors (see below), whose sum is σ = 44403120. Its totient is φ = 6308016.

The previous prime is 20502059. The next prime is 20502071. The reversal of 20502066 is 66020502.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9096 + ... + 11123.

It is an arithmetic number, because the mean of its divisors is an integer number (1850130).

Almost surely, 2^20502066 is an apocalyptic number.

20502066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20502066 is an abundant number, since it is smaller than the sum of its proper divisors (23901054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20502066 is a wasteful number, since it uses less digits than its factorization.

20502066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20250 (or 20237 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20502066 is about 4527.9207148536. The cubic root of 20502066 is about 273.6943774732.

Adding to 20502066 its reverse (66020502), we get a palindrome (86522568).

The spelling of 20502066 in words is "twenty million, five hundred two thousand, sixty-six".