21141423 has 12 divisors (see below), whose sum is σ = 31248360. Its totient is φ = 13766256.

The previous prime is 21141403. The next prime is 21141431. The reversal of 21141423 is 32414112.

It is not a de Polignac number, because 21141423 - 2⁵ = 21141391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21141396 and 21141405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26928 + ... + 27701.

It is an arithmetic number, because the mean of its divisors is an integer number (2604030).

Almost surely, 2^21141423 is an apocalyptic number.

21141423 is a deficient number, since it is larger than the sum of its proper divisors (10106937).

21141423 is a wasteful number, since it uses less digits than its factorization.

21141423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54678 (or 54675 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 21141423 is about 4597.9803174872. The cubic root of 21141423 is about 276.5103584743.

Adding to 21141423 its reverse (32414112), we get a palindrome (53555535).

The spelling of 21141423 in words is "twenty-one million, one hundred forty-one thousand, four hundred twenty-three".