2071099980 has 72 divisors (see below), whose sum is σ = 6376139952. Its totient is φ = 544046976.

The previous prime is 2071099957. The next prime is 2071099981. The reversal of 2071099980 is 899901702.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2071099981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73807 + ... + 97926.

Almost surely, 2^2071099980 is an apocalyptic number.

2071099980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2071099980 is an abundant number, since it is smaller than the sum of its proper divisors (4305039972).

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

2071099980 is a wasteful number, since it uses less digits than its factorization.

2071099980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171815 (or 171810 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 2071099980 is about 45509.3394810340. The cubic root of 2071099980 is about 1274.6776024529.

The spelling of 2071099980 in words is "two billion, seventy-one million, ninety-nine thousand, nine hundred eighty".