20422858 has 8 divisors (see below), whose sum is σ = 30681828. Its totient is φ = 10195584.

The previous prime is 20422847. The next prime is 20422859. The reversal of 20422858 is 85822402.

It can be written as a sum of positive squares in 2 ways, for example, as 19864849 + 558009 = 4457^2 + 747^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20422859) 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, 6241 + ... + 8932.

Almost surely, 2^20422858 is an apocalyptic number.

20422858 is a deficient number, since it is larger than the sum of its proper divisors (10258970).

20422858 is a wasteful number, since it uses less digits than its factorization.

20422858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15848.

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 20422858 is about 4519.1656309545. The cubic root of 20422858 is about 273.3414575548.

It can be divided in two parts, 2042 and 2858, that added together give a square (4900 = 70²).

The spelling of 20422858 in words is "twenty million, four hundred twenty-two thousand, eight hundred fifty-eight".