20945193 has 4 divisors (see below), whose sum is σ = 27926928. Its totient is φ = 13963460.

The previous prime is 20945167. The next prime is 20945209. The reversal of 20945193 is 39154902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20945193 - 2⁵ = 20945161 is a prime.

It is a super-2 number, since 2×20945193² = 877402219614498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20945693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3490863 + ... + 3490868.

It is an arithmetic number, because the mean of its divisors is an integer number (6981732).

Almost surely, 2^20945193 is an apocalyptic number.

It is an amenable number.

20945193 is a deficient number, since it is larger than the sum of its proper divisors (6981735).

20945193 is an equidigital number, since it uses as much as digits as its factorization.

20945193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6981734.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 20945193 is about 4576.5918542077. The cubic root of 20945193 is about 275.6521952691.

The spelling of 20945193 in words is "twenty million, nine hundred forty-five thousand, one hundred ninety-three".