20466819 has 12 divisors (see below), whose sum is σ = 31119400. Its totient is φ = 12926304.

The previous prime is 20466773. The next prime is 20466847. The reversal of 20466819 is 91866402.

It is not a de Polignac number, because 20466819 - 2²¹ = 18369667 is a prime.

It is a super-2 number, since 2×20466819² = 837781359957522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20466889) 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, 59674 + ... + 60015.

Almost surely, 2^20466819 is an apocalyptic number.

20466819 is a deficient number, since it is larger than the sum of its proper divisors (10652581).

20466819 is a wasteful number, since it uses less digits than its factorization.

20466819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119714 (or 119711 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20466819 is about 4524.0268566842. The cubic root of 20466819 is about 273.5374430565.

The spelling of 20466819 in words is "twenty million, four hundred sixty-six thousand, eight hundred nineteen".