20994219 has 6 divisors (see below), whose sum is σ = 30324996. Its totient is φ = 13996140.

The previous prime is 20994217. The next prime is 20994227. The reversal of 20994219 is 91249902.

It is not a de Polignac number, because 20994219 - 2¹ = 20994217 is a prime.

It is a super-2 number, since 2×20994219² = 881514462839922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20994217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1166337 + ... + 1166354.

It is an arithmetic number, because the mean of its divisors is an integer number (5054166).

Almost surely, 2^20994219 is an apocalyptic number.

20994219 is a deficient number, since it is larger than the sum of its proper divisors (9330777).

20994219 is a wasteful number, since it uses less digits than its factorization.

20994219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332697 (or 2332694 counting only the distinct ones).

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

The square root of 20994219 is about 4581.9448927284. The cubic root of 20994219 is about 275.8670989009.

The spelling of 20994219 in words is "twenty million, nine hundred ninety-four thousand, two hundred nineteen".