17620993 has 16 divisors (see below), whose sum is σ = 20393856. Its totient is φ = 15079680.

The previous prime is 17620987. The next prime is 17620997. The reversal of 17620993 is 39902671.

It is not a de Polignac number, because 17620993 - 2⁹ = 17620481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17620997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15130 + ... + 16252.

It is an arithmetic number, because the mean of its divisors is an integer number (1274616).

It is a Proth number, since it is equal to 2151 ⋅ 2¹³ + 1 and 2151 < 2¹³.

Almost surely, 2^17620993 is an apocalyptic number.

17620993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

17620993 is a deficient number, since it is larger than the sum of its proper divisors (2772863).

17620993 is a wasteful number, since it uses less digits than its factorization.

17620993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 17620993 is about 4197.7366520543. The cubic root of 17620993 is about 260.2216699300.

The spelling of 17620993 in words is "seventeen million, six hundred twenty thousand, nine hundred ninety-three".