22820887 has 4 divisors (see below), whose sum is σ = 23377536. Its totient is φ = 22264240.

The previous prime is 22820873. The next prime is 22820911. The reversal of 22820887 is 78802822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22820887 - 2²³ = 14432279 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 (22820827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278263 + ... + 278344.

It is an arithmetic number, because the mean of its divisors is an integer number (5844384).

Almost surely, 2^22820887 is an apocalyptic number.

22820887 is a deficient number, since it is larger than the sum of its proper divisors (556649).

22820887 is an equidigital number, since it uses as much as digits as its factorization.

22820887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556648.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 22820887 is about 4777.1212042401. The cubic root of 22820887 is about 283.6465508122.

It can be divided in two parts, 228 and 20887, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 22820887 in words is "twenty-two million, eight hundred twenty thousand, eight hundred eighty-seven".