220020679 has 4 divisors (see below), whose sum is σ = 220059976. Its totient is φ = 219981384.

The previous prime is 220020673. The next prime is 220020683. The reversal of 220020679 is 976020022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220020679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020673) 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, 9504 + ... + 23029.

It is an arithmetic number, because the mean of its divisors is an integer number (55014994).

Almost surely, 2^220020679 is an apocalyptic number.

220020679 is a deficient number, since it is larger than the sum of its proper divisors (39297).

220020679 is an equidigital number, since it uses as much as digits as its factorization.

220020679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39296.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 220020679 is about 14833.0940467591. The cubic root of 220020679 is about 603.6999875128.

The spelling of 220020679 in words is "two hundred twenty million, twenty thousand, six hundred seventy-nine".