20559922 has 4 divisors (see below), whose sum is σ = 30839886. Its totient is φ = 10279960.

The previous prime is 20559893. The next prime is 20559947. The reversal of 20559922 is 22995502.

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., 16475481 + 4084441 = 4059^2 + 2021^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5139979 + ... + 5139982.

Almost surely, 2^20559922 is an apocalyptic number.

20559922 is a deficient number, since it is larger than the sum of its proper divisors (10279964).

20559922 is a wasteful number, since it uses less digits than its factorization.

20559922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10279963.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 20559922 is about 4534.3050184124. The cubic root of 20559922 is about 273.9515871628.

The spelling of 20559922 in words is "twenty million, five hundred fifty-nine thousand, nine hundred twenty-two".