220676816381 has 4 divisors (see below), whose sum is σ = 252202075872. Its totient is φ = 189151556892.

The previous prime is 220676816303. The next prime is 220676816413. The reversal of 220676816381 is 183618676022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220676816381 - 2¹⁴ = 220676799997 is a prime.

It is a super-2 number, since 2×220676816381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220676810381) 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, 15762629735 + ... + 15762629748.

It is an arithmetic number, because the mean of its divisors is an integer number (63050518968).

Almost surely, 2^220676816381 is an apocalyptic number.

It is an amenable number.

220676816381 is a deficient number, since it is larger than the sum of its proper divisors (31525259491).

220676816381 is an equidigital number, since it uses as much as digits as its factorization.

220676816381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31525259490.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 220676816381 in words is "two hundred twenty billion, six hundred seventy-six million, eight hundred sixteen thousand, three hundred eighty-one".