21414723 has 8 divisors (see below), whose sum is σ = 31148736. Its totient is φ = 12978600.

The previous prime is 21414719. The next prime is 21414733. The reversal of 21414723 is 32741412.

It is a happy number.

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

It is not a de Polignac number, because 21414723 - 2² = 21414719 is a prime.

It is a super-2 number, since 2×21414723² = 917180722333458, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21414693 and 21414702.

It is not an unprimeable number, because it can be changed into a prime (21414733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324433 + ... + 324498.

It is an arithmetic number, because the mean of its divisors is an integer number (3893592).

Almost surely, 2^21414723 is an apocalyptic number.

21414723 is a deficient number, since it is larger than the sum of its proper divisors (9734013).

21414723 is a wasteful number, since it uses less digits than its factorization.

21414723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648945.

The product of its digits is 1344, while the sum is 24.

The square root of 21414723 is about 4627.6044558713. The cubic root of 21414723 is about 277.6967649204.

The spelling of 21414723 in words is "twenty-one million, four hundred fourteen thousand, seven hundred twenty-three".