19650090 has 16 divisors (see below), whose sum is σ = 47160288. Its totient is φ = 5240016.

The previous prime is 19650077. The next prime is 19650107. The reversal of 19650090 is 9005691.

It is a super-2 number, since 2×19650090² = 772252074016200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 655003 = 19650090 / (1 + 9 + 6 + 5 + 0 + 0 + 9 + 0).

It is an unprimeable number.

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, 327472 + ... + 327531.

It is an arithmetic number, because the mean of its divisors is an integer number (2947518).

Almost surely, 2^19650090 is an apocalyptic number.

19650090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19650090 is an abundant number, since it is smaller than the sum of its proper divisors (27510198).

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

19650090 is a wasteful number, since it uses less digits than its factorization.

19650090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655013.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 19650090 is about 4432.8422033725. The cubic root of 19650090 is about 269.8494359446.

The spelling of 19650090 in words is "nineteen million, six hundred fifty thousand, ninety".