21301074 has 12 divisors (see below), whose sum is σ = 46152366. Its totient is φ = 7100352.

The previous prime is 21301073. The next prime is 21301081. The reversal of 21301074 is 47010312.

It can be written as a sum of positive squares in only one way, i.e., 20385225 + 915849 = 4515^2 + 957^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1183393 = 21301074 / (2 + 1 + 3 + 0 + 1 + 0 + 7 + 4).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21301073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 591679 + ... + 591714.

Almost surely, 2^21301074 is an apocalyptic number.

21301074 is an abundant number, since it is smaller than the sum of its proper divisors (24851292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21301074 is a wasteful number, since it uses less digits than its factorization.

21301074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183401 (or 1183398 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 21301074 is about 4615.3086570673. The cubic root of 21301074 is about 277.2046431386.

Adding to 21301074 its reverse (47010312), we get a palindrome (68311386).

The spelling of 21301074 in words is "twenty-one million, three hundred one thousand, seventy-four".