21110954 has 4 divisors (see below), whose sum is σ = 31666434. Its totient is φ = 10555476.

The previous prime is 21110953. The next prime is 21110977. The reversal of 21110954 is 45901112.

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., 12567025 + 8543929 = 3545^2 + 2923^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21110953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5277737 + ... + 5277740.

Almost surely, 2^21110954 is an apocalyptic number.

21110954 is a deficient number, since it is larger than the sum of its proper divisors (10555480).

21110954 is a wasteful number, since it uses less digits than its factorization.

21110954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555479.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 21110954 is about 4594.6658202746. The cubic root of 21110954 is about 276.3774591149.

The spelling of 21110954 in words is "twenty-one million, one hundred ten thousand, nine hundred fifty-four".