20747222 has 8 divisors (see below), whose sum is σ = 31210056. Its totient is φ = 10343872.

The previous prime is 20747203. The next prime is 20747227. The reversal of 20747222 is 22274702.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20747191 and 20747200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20747227) 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, 13988 + ... + 15399.

It is an arithmetic number, because the mean of its divisors is an integer number (3901257).

Almost surely, 2^20747222 is an apocalyptic number.

20747222 is a deficient number, since it is larger than the sum of its proper divisors (10462834).

20747222 is a wasteful number, since it uses less digits than its factorization.

20747222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29742.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 20747222 is about 4554.9118542514. The cubic root of 20747222 is about 274.7809693956.

The spelling of 20747222 in words is "twenty million, seven hundred forty-seven thousand, two hundred twenty-two".