2106105690 has 64 divisors (see below), whose sum is σ = 5763695616. Its totient is φ = 487928832.

The previous prime is 2106105689. The next prime is 2106105697. The reversal of 2106105690 is 965016012.

It is a super-2 number, since 2×2106105690² = 8871362354900752200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2106105697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152202 + ... + 165461.

It is an arithmetic number, because the mean of its divisors is an integer number (90057744).

Almost surely, 2^2106105690 is an apocalyptic number.

2106105690 is an abundant number, since it is smaller than the sum of its proper divisors (3657589926).

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

2106105690 is a wasteful number, since it uses less digits than its factorization.

2106105690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317703.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 2106105690 is about 45892.3271364615. The cubic root of 2106105690 is about 1281.8190465674.

The spelling of 2106105690 in words is "two billion, one hundred six million, one hundred five thousand, six hundred ninety".