20216619 has 12 divisors (see below), whose sum is σ = 30144192. Its totient is φ = 13042800.

The previous prime is 20216593. The next prime is 20216633. The reversal of 20216619 is 91661202.

20216619 is a `hidden beast` number, since 20 + 21 + 6 + 619 = 666.

It is not a de Polignac number, because 20216619 - 2¹⁵ = 20183851 is a prime.

It is a super-2 number, since 2×20216619² = 817423367582322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20216592 and 20216601.

It is not an unprimeable number, because it can be changed into a prime (20216639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35952 + ... + 36509.

It is an arithmetic number, because the mean of its divisors is an integer number (2512016).

Almost surely, 2^20216619 is an apocalyptic number.

20216619 is a deficient number, since it is larger than the sum of its proper divisors (9927573).

20216619 is a wasteful number, since it uses less digits than its factorization.

20216619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72498 (or 72495 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 20216619 is about 4496.2894702187. The cubic root of 20216619 is about 272.4182354356.

The spelling of 20216619 in words is "twenty million, two hundred sixteen thousand, six hundred nineteen".