21574106 has 4 divisors (see below), whose sum is σ = 32361162. Its totient is φ = 10787052.

The previous prime is 21574087. The next prime is 21574129. The reversal of 21574106 is 60147512.

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., 14891881 + 6682225 = 3859^2 + 2585^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5393525 + ... + 5393528.

Almost surely, 2^21574106 is an apocalyptic number.

21574106 is a deficient number, since it is larger than the sum of its proper divisors (10787056).

21574106 is a wasteful number, since it uses less digits than its factorization.

21574106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10787055.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 21574106 is about 4644.7934292065. The cubic root of 21574106 is about 278.3839991272.

The spelling of 21574106 in words is "twenty-one million, five hundred seventy-four thousand, one hundred six".