2102011980 has 24 divisors (see below), whose sum is σ = 5885633712. Its totient is φ = 560536512.

The previous prime is 2102011979. The next prime is 2102011981. The reversal of 2102011980 is 891102012.

It is an interprime number because it is at equal distance from previous prime (2102011979) and next prime (2102011981).

It is a self number, because there is not a number n which added to its sum of digits gives 2102011980.

It is not an unprimeable number, because it can be changed into a prime (2102011981) 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, 17516707 + ... + 17516826.

It is an arithmetic number, because the mean of its divisors is an integer number (245234738).

Almost surely, 2^2102011980 is an apocalyptic number.

2102011980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102011980 is an abundant number, since it is smaller than the sum of its proper divisors (3783621732).

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

2102011980 is a wasteful number, since it uses less digits than its factorization.

2102011980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35033545 (or 35033543 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 2102011980 is about 45847.7041955211. The cubic root of 2102011980 is about 1280.9880026494.

Adding to 2102011980 its reverse (891102012), we get a palindrome (2993113992).

The spelling of 2102011980 in words is "two billion, one hundred two million, eleven thousand, nine hundred eighty".