16505970 has 32 divisors (see below), whose sum is σ = 42662592. Its totient is φ = 4062912.

The previous prime is 16505969. The next prime is 16505971. The reversal of 16505970 is 7950561.

It is an interprime number because it is at equal distance from previous prime (16505969) and next prime (16505971).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16505971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20772 + ... + 21551.

It is an arithmetic number, because the mean of its divisors is an integer number (1333206).

Almost surely, 2^16505970 is an apocalyptic number.

16505970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16505970 is an abundant number, since it is smaller than the sum of its proper divisors (26156622).

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

16505970 is a wasteful number, since it uses less digits than its factorization.

16505970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42346.

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 16505970 is about 4062.7539920601. The cubic root of 16505970 is about 254.6128689331.

The spelling of 16505970 in words is "sixteen million, five hundred five thousand, nine hundred seventy".