220190937691 has 4 divisors (see below), whose sum is σ = 221152470400. Its totient is φ = 219229404984.

The previous prime is 220190937679. The next prime is 220190937709. The reversal of 220190937691 is 196739091022.

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

It is a cyclic number.

It is not a de Polignac number, because 220190937691 - 2³⁷ = 82751984219 is a prime.

It is a super-2 number, since 2×220190937691² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220190937671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480766011 + ... + 480766468.

It is an arithmetic number, because the mean of its divisors is an integer number (55288117600).

Almost surely, 2^220190937691 is an apocalyptic number.

220190937691 is a deficient number, since it is larger than the sum of its proper divisors (961532709).

220190937691 is an equidigital number, since it uses as much as digits as its factorization.

220190937691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961532708.

The product of its (nonzero) digits is 367416, while the sum is 49.

The spelling of 220190937691 in words is "two hundred twenty billion, one hundred ninety million, nine hundred thirty-seven thousand, six hundred ninety-one".