20587222 has 16 divisors (see below), whose sum is σ = 33200640. Its totient is φ = 9543528.

The previous prime is 20587219. The next prime is 20587223. The reversal of 20587222 is 22278502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587223) 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, 3978 + ... + 7549.

It is an arithmetic number, because the mean of its divisors is an integer number (2075040).

Almost surely, 2^20587222 is an apocalyptic number.

20587222 is a deficient number, since it is larger than the sum of its proper divisors (12613418).

20587222 is a wasteful number, since it uses less digits than its factorization.

20587222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11595.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20587222 is about 4537.3144039178. The cubic root of 20587222 is about 274.0727868858.

The spelling of 20587222 in words is "twenty million, five hundred eighty-seven thousand, two hundred twenty-two".