21142430015 has 8 divisors (see below), whose sum is σ = 28995332640. Its totient is φ = 14497666272.

The previous prime is 21142429951. The next prime is 21142430051. The reversal of 21142430015 is 51003424112.

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 21142430015 - 2⁶ = 21142429951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302034680 + ... + 302034749.

It is an arithmetic number, because the mean of its divisors is an integer number (3624416580).

Almost surely, 2^21142430015 is an apocalyptic number.

21142430015 is a deficient number, since it is larger than the sum of its proper divisors (7852902625).

21142430015 is an equidigital number, since it uses as much as digits as its factorization.

21142430015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604069441.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21142430015 its reverse (51003424112), we get a palindrome (72145854127).

The spelling of 21142430015 in words is "twenty-one billion, one hundred forty-two million, four hundred thirty thousand, fifteen".