20673457 has 8 divisors (see below), whose sum is σ = 23716800. Its totient is φ = 17652624.

The previous prime is 20673427. The next prime is 20673461. The reversal of 20673457 is 75437602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20673457 - 2⁷ = 20673329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20673427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3607 + ... + 7372.

It is an arithmetic number, because the mean of its divisors is an integer number (2964600).

Almost surely, 2^20673457 is an apocalyptic number.

It is an amenable number.

20673457 is a deficient number, since it is larger than the sum of its proper divisors (3043343).

20673457 is a wasteful number, since it uses less digits than its factorization.

20673457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11255.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 20673457 is about 4546.8073414210. The cubic root of 20673457 is about 274.4549291575.

The spelling of 20673457 in words is "twenty million, six hundred seventy-three thousand, four hundred fifty-seven".