16642970 has 32 divisors (see below), whose sum is σ = 31781376. Its totient is φ = 6264000.

The previous prime is 16642943. The next prime is 16642973. The reversal of 16642970 is 7924661.

It is a self number, because there is not a number n which added to its sum of digits gives 16642970.

It is not an unprimeable number, because it can be changed into a prime (16642973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10745 + ... + 12195.

It is an arithmetic number, because the mean of its divisors is an integer number (993168).

Almost surely, 2^16642970 is an apocalyptic number.

16642970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16642970 is a deficient number, since it is larger than the sum of its proper divisors (15138406).

16642970 is a wasteful number, since it uses less digits than its factorization.

16642970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 16642970 is about 4079.5796352075. The cubic root of 16642970 is about 255.3153601836.

The spelling of 16642970 in words is "sixteen million, six hundred forty-two thousand, nine hundred seventy".