220993677 has 24 divisors (see below), whose sum is σ = 335724480. Its totient is φ = 145242720.

The previous prime is 220993609. The next prime is 220993687. The reversal of 220993677 is 776399022.

It is a happy number.

It is not a de Polignac number, because 220993677 - 2¹⁴ = 220977293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220993687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10849 + ... + 23657.

It is an arithmetic number, because the mean of its divisors is an integer number (13988520).

Almost surely, 2^220993677 is an apocalyptic number.

220993677 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

220993677 is a deficient number, since it is larger than the sum of its proper divisors (114730803).

220993677 is an equidigital number, since it uses as much as digits as its factorization.

220993677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12895 (or 12883 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 220993677 is about 14865.8560802935. The cubic root of 220993677 is about 604.5885935581.

The spelling of 220993677 in words is "two hundred twenty million, nine hundred ninety-three thousand, six hundred seventy-seven".