20928367 has 16 divisors (see below), whose sum is σ = 23304960. Its totient is φ = 18703872.

The previous prime is 20928361. The next prime is 20928373. The reversal of 20928367 is 76382902.

It is an interprime number because it is at equal distance from previous prime (20928361) and next prime (20928373).

It is a cyclic number.

It is not a de Polignac number, because 20928367 - 2³ = 20928359 is a prime.

It is a super-3 number, since 3×20928367³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20928361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35983 + ... + 36559.

It is an arithmetic number, because the mean of its divisors is an integer number (1456560).

Almost surely, 2^20928367 is an apocalyptic number.

20928367 is a deficient number, since it is larger than the sum of its proper divisors (2376593).

20928367 is a wasteful number, since it uses less digits than its factorization.

20928367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20928367 is about 4574.7532173878. The cubic root of 20928367 is about 275.5783618382.

The spelling of 20928367 in words is "twenty million, nine hundred twenty-eight thousand, three hundred sixty-seven".