2102012020 has 24 divisors (see below), whose sum is σ = 4508146944. Its totient is φ = 822914976.

The previous prime is 2102011981. The next prime is 2102012027. The reversal of 2102012020 is 202102012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2102011988 and 2102012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102012027) 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, 1117152 + ... + 1119031.

It is an arithmetic number, because the mean of its divisors is an integer number (187839456).

Almost surely, 2^2102012020 is an apocalyptic number.

2102012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102012020 is an abundant number, since it is smaller than the sum of its proper divisors (2406134924).

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

2102012020 is a wasteful number, since it uses less digits than its factorization.

2102012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236239 (or 2236237 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2102012020 is about 45847.7046317479. The cubic root of 2102012020 is about 1280.9880107749.

Adding to 2102012020 its reverse (202102012), we get a palindrome (2304114032).

The spelling of 2102012020 in words is "two billion, one hundred two million, twelve thousand, twenty".