20928607 has 8 divisors (see below), whose sum is σ = 24062976. Its totient is φ = 17830392.

The previous prime is 20928541. The next prime is 20928629. The reversal of 20928607 is 70682902.

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 20928607 - 2¹¹ = 20926559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20928637) 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, 7783 + ... + 10120.

It is an arithmetic number, because the mean of its divisors is an integer number (3007872).

Almost surely, 2^20928607 is an apocalyptic number.

20928607 is a deficient number, since it is larger than the sum of its proper divisors (3134369).

20928607 is a wasteful number, since it uses less digits than its factorization.

20928607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18077.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 20928607 is about 4574.7794482357. The cubic root of 20928607 is about 275.5794152498.

The spelling of 20928607 in words is "twenty million, nine hundred twenty-eight thousand, six hundred seven".