20673351 has 6 divisors (see below), whose sum is σ = 29861520. Its totient is φ = 13782228.

The previous prime is 20673347. The next prime is 20673361. The reversal of 20673351 is 15337602.

It is a happy number.

It is not a de Polignac number, because 20673351 - 2² = 20673347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673361) 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, 1148511 + ... + 1148528.

It is an arithmetic number, because the mean of its divisors is an integer number (4976920).

Almost surely, 2^20673351 is an apocalyptic number.

20673351 is a deficient number, since it is larger than the sum of its proper divisors (9188169).

20673351 is a wasteful number, since it uses less digits than its factorization.

20673351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297045 (or 2297042 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20673351 is about 4546.7956848752. The cubic root of 20673351 is about 274.4544600814.

The spelling of 20673351 in words is "twenty million, six hundred seventy-three thousand, three hundred fifty-one".