19700090 has 16 divisors (see below), whose sum is σ = 36325800. Its totient is φ = 7687680.

The previous prime is 19700069. The next prime is 19700099. The reversal of 19700090 is 9000791.

It can be written as a sum of positive squares in 4 ways, for example, as 5764801 + 13935289 = 2401^2 + 3733^2 .

It is a super-3 number, since 3×19700090³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (19700099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23615 + ... + 24434.

Almost surely, 2^19700090 is an apocalyptic number.

19700090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19700090 is a deficient number, since it is larger than the sum of its proper divisors (16625710).

19700090 is a wasteful number, since it uses less digits than its factorization.

19700090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48097.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 19700090 is about 4438.4783428558. The cubic root of 19700090 is about 270.0781209702.

The spelling of 19700090 in words is "nineteen million, seven hundred thousand, ninety".