21241442415 has 32 divisors (see below), whose sum is σ = 34217164800. Its totient is φ = 11252054016.

The previous prime is 21241442377. The next prime is 21241442473. The reversal of 21241442415 is 51424414212.

It is not a de Polignac number, because 21241442415 - 2²⁵ = 21207887983 is a prime.

It is a super-2 number, since 2×21241442415² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1494834 + ... + 1508976.

It is an arithmetic number, because the mean of its divisors is an integer number (1069286400).

Almost surely, 2^21241442415 is an apocalyptic number.

21241442415 is a deficient number, since it is larger than the sum of its proper divisors (12975722385).

21241442415 is a wasteful number, since it uses less digits than its factorization.

21241442415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14823.

The product of its digits is 10240, while the sum is 30.

Adding to 21241442415 its reverse (51424414212), we get a palindrome (72665856627).

The spelling of 21241442415 in words is "twenty-one billion, two hundred forty-one million, four hundred forty-two thousand, four hundred fifteen".