20021020502 has 16 divisors (see below), whose sum is σ = 34324873632. Its totient is φ = 8579656320.

The previous prime is 20021020477. The next prime is 20021020507. The reversal of 20021020502 is 20502012002.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021020507) 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, 110552 + ... + 228612.

It is an arithmetic number, because the mean of its divisors is an integer number (2145304602).

Almost surely, 2^20021020502 is an apocalyptic number.

20021020502 is a deficient number, since it is larger than the sum of its proper divisors (14303853130).

20021020502 is a wasteful number, since it uses less digits than its factorization.

20021020502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130183.

The product of its (nonzero) digits is 80, while the sum is 14.

Adding to 20021020502 its reverse (20502012002), we get a palindrome (40523032504).

The spelling of 20021020502 in words is "twenty billion, twenty-one million, twenty thousand, five hundred two".