2091918214 has 4 divisors (see below), whose sum is σ = 3137877324. Its totient is φ = 1045959106.

The previous prime is 2091918203. The next prime is 2091918217. The reversal of 2091918214 is 4128191902.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2091918214² = 8752243628129899592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091918217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522979552 + ... + 522979555.

It is an arithmetic number, because the mean of its divisors is an integer number (784469331).

Almost surely, 2^2091918214 is an apocalyptic number.

2091918214 is a deficient number, since it is larger than the sum of its proper divisors (1045959110).

2091918214 is a wasteful number, since it uses less digits than its factorization.

2091918214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045959109.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 2091918214 is about 45737.4924323579. The cubic root of 2091918214 is about 1278.9342964742.

The spelling of 2091918214 in words is "two billion, ninety-one million, nine hundred eighteen thousand, two hundred fourteen".