20023020020 has 24 divisors (see below), whose sum is σ = 42280660968. Its totient is φ = 7964956800.

The previous prime is 20023019999. The next prime is 20023020049. The reversal of 20023020020 is 2002032002.

It can be written as a sum of positive squares in 4 ways, for example, as 471150436 + 19551869584 = 21706^2 + 139828^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20023019983 and 20023020010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2761991 + ... + 2769230.

It is an arithmetic number, because the mean of its divisors is an integer number (1761694207).

Almost surely, 2^20023020020 is an apocalyptic number.

20023020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20023020020 is an abundant number, since it is smaller than the sum of its proper divisors (22257640948).

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

20023020020 is a wasteful number, since it uses less digits than its factorization.

20023020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531411 (or 5531409 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

Adding to 20023020020 its reverse (2002032002), we get a palindrome (22025052022).

The spelling of 20023020020 in words is "twenty billion, twenty-three million, twenty thousand, twenty".