20020001020 has 12 divisors (see below), whose sum is σ = 42042002184. Its totient is φ = 8008000400.

The previous prime is 20020000993. The next prime is 20020001039. The reversal of 20020001020 is 2010002002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20020000994 and 20020001012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500500006 + ... + 500500045.

It is an arithmetic number, because the mean of its divisors is an integer number (3503500182).

Almost surely, 2^20020001020 is an apocalyptic number.

20020001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020001020 is an abundant number, since it is smaller than the sum of its proper divisors (22022001164).

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

20020001020 is a wasteful number, since it uses less digits than its factorization.

20020001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001000060 (or 1001000058 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 20020001020 its reverse (2010002002), we get a palindrome (22030003022).

The spelling of 20020001020 in words is "twenty billion, twenty million, one thousand, twenty".