22461818 has 4 divisors (see below), whose sum is σ = 33692730. Its totient is φ = 11230908.

The previous prime is 22461799. The next prime is 22461839. The reversal of 22461818 is 81816422.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81816422 = 2 ⋅40908211.

It can be written as a sum of positive squares in only one way, i.e., 21132409 + 1329409 = 4597^2 + 1153^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615453 + ... + 5615456.

Almost surely, 2^22461818 is an apocalyptic number.

22461818 is a deficient number, since it is larger than the sum of its proper divisors (11230912).

22461818 is a wasteful number, since it uses less digits than its factorization.

22461818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11230911.

The product of its digits is 6144, while the sum is 32.

The square root of 22461818 is about 4739.3900451429. The cubic root of 22461818 is about 282.1510265250.

The spelling of 22461818 in words is "twenty-two million, four hundred sixty-one thousand, eight hundred eighteen".