16820738 has 16 divisors (see below), whose sum is σ = 28974240. Its totient is φ = 7243200.

The previous prime is 16820729. The next prime is 16820743. The reversal of 16820738 is 83702861.

It is a junction number, because it is equal to n+sod(n) for n = 16820698 and 16820707.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19703 + ... + 20538.

It is an arithmetic number, because the mean of its divisors is an integer number (1810890).

Almost surely, 2^16820738 is an apocalyptic number.

16820738 is a deficient number, since it is larger than the sum of its proper divisors (12153502).

16820738 is a wasteful number, since it uses less digits than its factorization.

16820738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40273.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 16820738 is about 4101.3093031372. The cubic root of 16820738 is about 256.2211731998.

The spelling of 16820738 in words is "sixteen million, eight hundred twenty thousand, seven hundred thirty-eight".