16720570 has 16 divisors (see below), whose sum is σ = 31681440. Its totient is φ = 6336144.

The previous prime is 16720567. The next prime is 16720573. The reversal of 16720570 is 7502761.

It is an interprime number because it is at equal distance from previous prime (16720567) and next prime (16720573).

It is a super-2 number, since 2×16720570² = 559154922249800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16720573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43812 + ... + 44191.

It is an arithmetic number, because the mean of its divisors is an integer number (1980090).

Almost surely, 2^16720570 is an apocalyptic number.

16720570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16720570 is a deficient number, since it is larger than the sum of its proper divisors (14960870).

16720570 is a wasteful number, since it uses less digits than its factorization.

16720570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88029.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 16720570 is about 4089.0793584865. The cubic root of 16720570 is about 255.7115586732.

The spelling of 16720570 in words is "sixteen million, seven hundred twenty thousand, five hundred seventy".