20826216 has 24 divisors (see below), whose sum is σ = 56404530. Its totient is φ = 6942048.

The previous prime is 20826209. The next prime is 20826251. The reversal of 20826216 is 61262802.

It can be written as a sum of positive squares in only one way, i.e., 17388900 + 3437316 = 4170^2 + 1854^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20826216.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144555 + ... + 144698.

Almost surely, 2^20826216 is an apocalyptic number.

It is an amenable number.

20826216 is an abundant number, since it is smaller than the sum of its proper divisors (35578314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20826216 is a wasteful number, since it uses less digits than its factorization.

20826216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289265 (or 289258 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20826216 is about 4563.5749144722. The cubic root of 20826216 is about 275.1292659497.

The spelling of 20826216 in words is "twenty million, eight hundred twenty-six thousand, two hundred sixteen".