2100772540 has 24 divisors (see below), whose sum is σ = 4434024672. Its totient is φ = 836041920.

The previous prime is 2100772537. The next prime is 2100772547. The reversal of 2100772540 is 452770012.

It is a junction number, because it is equal to n+sod(n) for n = 2100772499 and 2100772508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100772547) 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, 262656 + ... + 270535.

It is an arithmetic number, because the mean of its divisors is an integer number (184751028).

Almost surely, 2^2100772540 is an apocalyptic number.

2100772540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100772540 is an abundant number, since it is smaller than the sum of its proper divisors (2333252132).

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

2100772540 is a wasteful number, since it uses less digits than its factorization.

2100772540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533397 (or 533395 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 2100772540 is about 45834.1852769306. The cubic root of 2100772540 is about 1280.7361772636.

The spelling of 2100772540 in words is "two billion, one hundred million, seven hundred seventy-two thousand, five hundred forty".