2166051020 has 24 divisors (see below), whose sum is σ = 5198522784. Its totient is φ = 742646016.

The previous prime is 2166051007. The next prime is 2166051029. The reversal of 2166051020 is 201506612.

It is not an unprimeable number, because it can be changed into a prime (2166051029) 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, 7735757 + ... + 7736036.

It is an arithmetic number, because the mean of its divisors is an integer number (216605116).

Almost surely, 2^2166051020 is an apocalyptic number.

2166051020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166051020 is an abundant number, since it is smaller than the sum of its proper divisors (3032471764).

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

2166051020 is a wasteful number, since it uses less digits than its factorization.

2166051020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15471809 (or 15471807 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2166051020 is about 46540.8532366995. The cubic root of 2166051020 is about 1293.8667744643.

Adding to 2166051020 its reverse (201506612), we get a palindrome (2367557632).

The spelling of 2166051020 in words is "two billion, one hundred sixty-six million, fifty-one thousand, twenty".