20904922 has 4 divisors (see below), whose sum is σ = 31357386. Its totient is φ = 10452460.

The previous prime is 20904899. The next prime is 20904931. The reversal of 20904922 is 22940902.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 14907321 + 5997601 = 3861^2 + 2449^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5226229 + ... + 5226232.

Almost surely, 2^20904922 is an apocalyptic number.

20904922 is a deficient number, since it is larger than the sum of its proper divisors (10452464).

20904922 is a wasteful number, since it uses less digits than its factorization.

20904922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10452463.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20904922 is about 4572.1900660406. The cubic root of 20904922 is about 275.4754178481.

The spelling of 20904922 in words is "twenty million, nine hundred four thousand, nine hundred twenty-two".