20194619 has 2 divisors, whose sum is σ = 20194620. Its totient is φ = 20194618.

The previous prime is 20194583. The next prime is 20194633. The reversal of 20194619 is 91649102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20194619 - 2¹² = 20190523 is a prime.

It is a super-2 number, since 2×20194619² = 815645273110322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20194639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097309 + 10097310.

It is an arithmetic number, because the mean of its divisors is an integer number (10097310).

Almost surely, 2^20194619 is an apocalyptic number.

20194619 is a deficient number, since it is larger than the sum of its proper divisors (1).

20194619 is an equidigital number, since it uses as much as digits as its factorization.

20194619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 20194619 is about 4493.8423425839. The cubic root of 20194619 is about 272.3193831587.

The spelling of 20194619 in words is "twenty million, one hundred ninety-four thousand, six hundred nineteen".