20926867 has 16 divisors (see below), whose sum is σ = 23386720. Its totient is φ = 18600192.

The previous prime is 20926861. The next prime is 20926883. The reversal of 20926867 is 76862902.

It is not a de Polignac number, because 20926867 - 2³ = 20926859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20926861) 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, 66703 + ... + 67015.

It is an arithmetic number, because the mean of its divisors is an integer number (1461670).

Almost surely, 2^20926867 is an apocalyptic number.

20926867 is a deficient number, since it is larger than the sum of its proper divisors (2459853).

20926867 is a wasteful number, since it uses less digits than its factorization.

20926867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 20926867 is about 4574.5892711805. The cubic root of 20926867 is about 275.5717778332.

The spelling of 20926867 in words is "twenty million, nine hundred twenty-six thousand, eight hundred sixty-seven".