20422284 has 12 divisors (see below), whose sum is σ = 47652024. Its totient is φ = 6807424.

The previous prime is 20422277. The next prime is 20422309. The reversal of 20422284 is 48222402.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850917 + ... + 850940.

It is an arithmetic number, because the mean of its divisors is an integer number (3971002).

Almost surely, 2^20422284 is an apocalyptic number.

It is an amenable number.

20422284 is an abundant number, since it is smaller than the sum of its proper divisors (27229740).

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

20422284 is a wasteful number, since it uses less digits than its factorization.

20422284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701864 (or 1701862 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 20422284 is about 4519.1021232099. The cubic root of 20422284 is about 273.3388967074.

Adding to 20422284 its reverse (48222402), we get a palindrome (68644686).

It can be divided in two parts, 20422 and 284, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 20422284 in words is "twenty million, four hundred twenty-two thousand, two hundred eighty-four".