21474093 has 8 divisors (see below), whose sum is σ = 28792800. Its totient is φ = 14235728.

The previous prime is 21474091. The next prime is 21474113. The reversal of 21474093 is 39047412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21474093 - 2¹ = 21474091 is a prime.

It is a super-2 number, since 2×21474093² = 922273340345298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21474093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21474091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19458 + ... + 20531.

It is an arithmetic number, because the mean of its divisors is an integer number (3599100).

Almost surely, 2^21474093 is an apocalyptic number.

It is an amenable number.

21474093 is a deficient number, since it is larger than the sum of its proper divisors (7318707).

21474093 is a wasteful number, since it uses less digits than its factorization.

21474093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40171.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 21474093 is about 4634.0147820222. The cubic root of 21474093 is about 277.9531561946.

It can be divided in two parts, 2147409 and 3, that added together give a palindrome (2147412).

The spelling of 21474093 in words is "twenty-one million, four hundred seventy-four thousand, ninety-three".