16986684901 has 2 divisors, whose sum is σ = 16986684902. Its totient is φ = 16986684900.

The previous prime is 16986684881. The next prime is 16986684929. The reversal of 16986684901 is 10948668961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15542608900 + 1444076001 = 124670^2 + 38001^2 .

It is a cyclic number.

It is not a de Polignac number, because 16986684901 - 2³¹ = 14839201253 is a prime.

It is a super-2 number, since 2×16986684901² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16986684601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8493342450 + 8493342451.

It is an arithmetic number, because the mean of its divisors is an integer number (8493342451).

Almost surely, 2^16986684901 is an apocalyptic number.

It is an amenable number.

16986684901 is a deficient number, since it is larger than the sum of its proper divisors (1).

16986684901 is an equidigital number, since it uses as much as digits as its factorization.

16986684901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 16986684901 in words is "sixteen billion, nine hundred eighty-six million, six hundred eighty-four thousand, nine hundred one".