20219994 has 24 divisors (see below), whose sum is σ = 44202132. Its totient is φ = 6679680.

The previous prime is 20219951. The next prime is 20220007. The reversal of 20219994 is 49991202.

It can be written as a sum of positive squares in 2 ways, for example, as 11594025 + 8625969 = 3405^2 + 2937^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2937 + ... + 7004.

Almost surely, 2^20219994 is an apocalyptic number.

20219994 is an abundant number, since it is smaller than the sum of its proper divisors (23982138).

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

20219994 is a wasteful number, since it uses less digits than its factorization.

20219994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062 (or 10059 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 20219994 is about 4496.6647640223. The cubic root of 20219994 is about 272.4333939278.

The spelling of 20219994 in words is "twenty million, two hundred nineteen thousand, nine hundred ninety-four".