220021377 has 16 divisors (see below), whose sum is σ = 295809792. Its totient is φ = 145463040.

The previous prime is 220021337. The next prime is 220021397. The reversal of 220021377 is 773120022.

It is not a de Polignac number, because 220021377 - 2⁶ = 220021313 is a prime.

It is a super-2 number, since 2×220021377² = 96818812673952258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220021337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224713 + ... + 225689.

It is an arithmetic number, because the mean of its divisors is an integer number (18488112).

Almost surely, 2^220021377 is an apocalyptic number.

It is an amenable number.

220021377 is a deficient number, since it is larger than the sum of its proper divisors (75788415).

220021377 is a wasteful number, since it uses less digits than its factorization.

220021377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 220021377 is about 14833.1175752099. The cubic root of 220021377 is about 603.7006259106.

Adding to 220021377 its reverse (773120022), we get a palindrome (993141399).

The spelling of 220021377 in words is "two hundred twenty million, twenty-one thousand, three hundred seventy-seven".