16820970 has 32 divisors (see below), whose sum is σ = 40538880. Its totient is φ = 4466880.

The previous prime is 16820929. The next prime is 16820987. The reversal of 16820970 is 7902861.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7096 + ... + 9164.

It is an arithmetic number, because the mean of its divisors is an integer number (1266840).

Almost surely, 2^16820970 is an apocalyptic number.

16820970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16820970 is an abundant number, since it is smaller than the sum of its proper divisors (23717910).

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

16820970 is a wasteful number, since it uses less digits than its factorization.

16820970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 16820970 is about 4101.3375866905. The cubic root of 16820970 is about 256.2223511711. Note that the first 3 decimals are identical.

It can be divided in two parts, 1 and 6820970, that added together give a triangular number (6820971 = T₃₆₉₃).

The spelling of 16820970 in words is "sixteen million, eight hundred twenty thousand, nine hundred seventy".