20216654 has 8 divisors (see below), whose sum is σ = 31370760. Its totient is φ = 9759736.

The previous prime is 20216641. The next prime is 20216659. The reversal of 20216654 is 45661202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216659) 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, 174224 + ... + 174339.

It is an arithmetic number, because the mean of its divisors is an integer number (3921345).

Almost surely, 2^20216654 is an apocalyptic number.

20216654 is a deficient number, since it is larger than the sum of its proper divisors (11154106).

20216654 is a wasteful number, since it uses less digits than its factorization.

20216654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348594.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20216654 is about 4496.2933623152. The cubic root of 20216654 is about 272.4183926434.

Adding to 20216654 its reverse (45661202), we get a palindrome (65877856).

The spelling of 20216654 in words is "twenty million, two hundred sixteen thousand, six hundred fifty-four".