2100192990 has 128 divisors (see below), whose sum is σ = 5892590592. Its totient is φ = 469171200.

The previous prime is 2100192977. The next prime is 2100193003. The reversal of 2100192990 is 992910012.

It is an interprime number because it is at equal distance from previous prime (2100192977) and next prime (2100193003).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1759834 + ... + 1761026.

It is an arithmetic number, because the mean of its divisors is an integer number (46035864).

Almost surely, 2^2100192990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100192990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2946295296).

2100192990 is an abundant number, since it is smaller than the sum of its proper divisors (3792397602).

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

2100192990 is a wasteful number, since it uses less digits than its factorization.

2100192990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 2100192990 is about 45827.8625947141. The cubic root of 2100192990 is about 1280.6183921943.

The spelling of 2100192990 in words is "two billion, one hundred million, one hundred ninety-two thousand, nine hundred ninety".