21142023 has 24 divisors (see below), whose sum is σ = 32856192. Its totient is φ = 11844864.

The previous prime is 21142021. The next prime is 21142061. The reversal of 21142023 is 32024112.

It is not a de Polignac number, because 21142023 - 2¹ = 21142021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21141993 and 21142011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197536 + ... + 197642.

It is an arithmetic number, because the mean of its divisors is an integer number (1369008).

Almost surely, 2^21142023 is an apocalyptic number.

21142023 is a deficient number, since it is larger than the sum of its proper divisors (11714169).

21142023 is an equidigital number, since it uses as much as digits as its factorization.

21142023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21142023 is about 4598.0455630626. The cubic root of 21142023 is about 276.5129742655.

Adding to 21142023 its reverse (32024112), we get a palindrome (53166135).

The spelling of 21142023 in words is "twenty-one million, one hundred forty-two thousand, twenty-three".