2100690740 has 36 divisors (see below), whose sum is σ = 4611615204. Its totient is φ = 803738496.

The previous prime is 2100690707. The next prime is 2100690769. The reversal of 2100690740 is 470960012.

It can be written as a sum of positive squares in 2 ways, for example, as 1485948304 + 614742436 = 38548^2 + 24794^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88697 + ... + 109856.

Almost surely, 2^2100690740 is an apocalyptic number.

2100690740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100690740 is an abundant number, since it is smaller than the sum of its proper divisors (2510924464).

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

2100690740 is a wasteful number, since it uses less digits than its factorization.

2100690740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198608 (or 198583 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2100690740 is about 45833.2929211943. The cubic root of 2100690740 is about 1280.7195539220.

The spelling of 2100690740 in words is "two billion, one hundred million, six hundred ninety thousand, seven hundred forty".