21623414 has 8 divisors (see below), whose sum is σ = 32520960. Its totient is φ = 10783096.

The previous prime is 21623411. The next prime is 21623419. The reversal of 21623414 is 41432612.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21623414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21623411) 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, 13349 + ... + 14880.

It is an arithmetic number, because the mean of its divisors is an integer number (4065120).

Almost surely, 2^21623414 is an apocalyptic number.

21623414 is a deficient number, since it is larger than the sum of its proper divisors (10897546).

21623414 is a wasteful number, since it uses less digits than its factorization.

21623414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28614.

The product of its digits is 1152, while the sum is 23.

The square root of 21623414 is about 4650.0982785313. The cubic root of 21623414 is about 278.5959216058.

The spelling of 21623414 in words is "twenty-one million, six hundred twenty-three thousand, four hundred fourteen".