21413674 has 8 divisors (see below), whose sum is σ = 32560740. Its totient is φ = 10560096.

The previous prime is 21413647. The next prime is 21413677. The reversal of 21413674 is 47631412.

It can be written as a sum of positive squares in 2 ways, for example, as 21224449 + 189225 = 4607^2 + 435^2 .

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 (21413677) 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, 73189 + ... + 73480.

Almost surely, 2^21413674 is an apocalyptic number.

21413674 is a deficient number, since it is larger than the sum of its proper divisors (11147066).

21413674 is a wasteful number, since it uses less digits than its factorization.

21413674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146744.

The product of its digits is 4032, while the sum is 28.

The square root of 21413674 is about 4627.4911129034. The cubic root of 21413674 is about 277.6922305219.

The spelling of 21413674 in words is "twenty-one million, four hundred thirteen thousand, six hundred seventy-four".