16720970 has 32 divisors (see below), whose sum is σ = 35054208. Its totient is φ = 5623488.

The previous prime is 16720967. The next prime is 16720973. The reversal of 16720970 is 7902761.

It is an interprime number because it is at equal distance from previous prime (16720967) and next prime (16720973).

It is not an unprimeable number, because it can be changed into a prime (16720973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1457 + ... + 5963.

It is an arithmetic number, because the mean of its divisors is an integer number (1095444).

Almost surely, 2^16720970 is an apocalyptic number.

16720970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16720970 is an abundant number, since it is smaller than the sum of its proper divisors (18333238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16720970 is a wasteful number, since it uses less digits than its factorization.

16720970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 16720970 is about 4089.1282689590. The cubic root of 16720970 is about 255.7135977546.

The spelling of 16720970 in words is "sixteen million, seven hundred twenty thousand, nine hundred seventy".