20222278 has 4 divisors (see below), whose sum is σ = 30333420. Its totient is φ = 10111138.

The previous prime is 20222249. The next prime is 20222287. The reversal of 20222278 is 87222202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055568 + ... + 5055571.

It is an arithmetic number, because the mean of its divisors is an integer number (7583355).

Almost surely, 2^20222278 is an apocalyptic number.

20222278 is a deficient number, since it is larger than the sum of its proper divisors (10111142).

20222278 is a wasteful number, since it uses less digits than its factorization.

20222278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111141.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20222278 is about 4496.9187228590. The cubic root of 20222278 is about 272.4436513401.

The spelling of 20222278 in words is "twenty million, two hundred twenty-two thousand, two hundred seventy-eight".