21030313415 has 4 divisors (see below), whose sum is σ = 25236376104. Its totient is φ = 16824250728.

The previous prime is 21030313411. The next prime is 21030313429. The reversal of 21030313415 is 51431303012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21030313415 - 2² = 21030313411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030313411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2103031337 + ... + 2103031346.

It is an arithmetic number, because the mean of its divisors is an integer number (6309094026).

Almost surely, 2^21030313415 is an apocalyptic number.

21030313415 is a deficient number, since it is larger than the sum of its proper divisors (4206062689).

21030313415 is an equidigital number, since it uses as much as digits as its factorization.

21030313415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206062688.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 21030313415 its reverse (51431303012), we get a palindrome (72461616427).

The spelling of 21030313415 in words is "twenty-one billion, thirty million, three hundred thirteen thousand, four hundred fifteen".