20716550 has 12 divisors (see below), whose sum is σ = 38532876. Its totient is φ = 8286600.

The previous prime is 20716543. The next prime is 20716561. The reversal of 20716550 is 5561702.

It is a Curzon number.

It is a congruent number.

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, 207116 + ... + 207215.

It is an arithmetic number, because the mean of its divisors is an integer number (3211073).

Almost surely, 2^20716550 is an apocalyptic number.

20716550 is a deficient number, since it is larger than the sum of its proper divisors (17816326).

20716550 is a wasteful number, since it uses less digits than its factorization.

20716550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414343 (or 414338 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 20716550 is about 4551.5436941767. The cubic root of 20716550 is about 274.6454936104.

The spelling of 20716550 in words is "twenty million, seven hundred sixteen thousand, five hundred fifty".