20766222 has 24 divisors (see below), whose sum is σ = 45630000. Its totient is φ = 6824160.

The previous prime is 20766211. The next prime is 20766241. The reversal of 20766222 is 22266702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6847 + ... + 9402.

It is an arithmetic number, because the mean of its divisors is an integer number (1901250).

Almost surely, 2^20766222 is an apocalyptic number.

20766222 is an abundant number, since it is smaller than the sum of its proper divisors (24863778).

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

20766222 is a wasteful number, since it uses less digits than its factorization.

20766222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16328 (or 16325 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20766222 is about 4556.9970375237. The cubic root of 20766222 is about 274.8648239233.

Adding to 20766222 its sum of digits (27), we get a square (20766249 = 4557²).

The spelling of 20766222 in words is "twenty million, seven hundred sixty-six thousand, two hundred twenty-two".