16720005664730 has 16 divisors (see below), whose sum is σ = 30100390470144. Its totient is φ = 6687028871760.

The previous prime is 16720005664709. The next prime is 16720005664751. The reversal of 16720005664730 is 3746650002761.

It is an interprime number because it is at equal distance from previous prime (16720005664709) and next prime (16720005664751).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121602122 + ... + 121739541.

It is an arithmetic number, because the mean of its divisors is an integer number (1881274404384).

Almost surely, 2^{16720005664730} is an apocalyptic number.

16720005664730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16720005664730 is a deficient number, since it is larger than the sum of its proper divisors (13380384805414).

16720005664730 is a wasteful number, since it uses less digits than its factorization.

16720005664730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243348541.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 16720005664730 in words is "sixteen trillion, seven hundred twenty billion, five million, six hundred sixty-four thousand, seven hundred thirty".