20946189 has 24 divisors (see below), whose sum is σ = 32324320. Its totient is φ = 12022560.

The previous prime is 20946179. The next prime is 20946197. The reversal of 20946189 is 98164902.

It is not a de Polignac number, because 20946189 - 2⁵ = 20946157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20946179) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5379 + ... + 8415.

Almost surely, 2^20946189 is an apocalyptic number.

It is an amenable number.

20946189 is a deficient number, since it is larger than the sum of its proper divisors (11378131).

20946189 is a wasteful number, since it uses less digits than its factorization.

20946189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081 (or 3070 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 20946189 is about 4576.7006675115. The cubic root of 20946189 is about 275.6565645331.

The spelling of 20946189 in words is "twenty million, nine hundred forty-six thousand, one hundred eighty-nine".