20100219 has 16 divisors (see below), whose sum is σ = 27840000. Its totient is φ = 12884256.

The previous prime is 20100217. The next prime is 20100251. The reversal of 20100219 is 91200102.

It is a happy number.

It is not a de Polignac number, because 20100219 - 2¹ = 20100217 is a prime.

It is a super-2 number, since 2×20100219² = 808037607695922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20100198 and 20100207.

It is not an unprimeable number, because it can be changed into a prime (20100217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40032 + ... + 40530.

It is an arithmetic number, because the mean of its divisors is an integer number (1740000).

Almost surely, 2^20100219 is an apocalyptic number.

20100219 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20100219 is a deficient number, since it is larger than the sum of its proper divisors (7739781).

20100219 is a wasteful number, since it uses less digits than its factorization.

20100219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 20100219 is about 4483.3267781860. The cubic root of 20100219 is about 271.8944001482.

The spelling of 20100219 in words is "twenty million, one hundred thousand, two hundred nineteen".