20678933 has 8 divisors (see below), whose sum is σ = 22602720. Its totient is φ = 18762480.

The previous prime is 20678923. The next prime is 20678951. The reversal of 20678933 is 33987602.

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

It is not a de Polignac number, because 20678933 - 2⁸ = 20678677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20678923) 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, 5291 + ... + 8327.

It is an arithmetic number, because the mean of its divisors is an integer number (2825340).

Almost surely, 2^20678933 is an apocalyptic number.

It is an amenable number.

20678933 is a deficient number, since it is larger than the sum of its proper divisors (1923787).

20678933 is a wasteful number, since it uses less digits than its factorization.

20678933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3667.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 20678933 is about 4547.4094823317. The cubic root of 20678933 is about 274.4791596239.

The spelling of 20678933 in words is "twenty million, six hundred seventy-eight thousand, nine hundred thirty-three".