21411420145 has 8 divisors (see below), whose sum is σ = 26077192704. Its totient is φ = 16873477104.

The previous prime is 21411420137. The next prime is 21411420161. The reversal of 21411420145 is 54102411412.

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 21411420145 - 2³ = 21411420137 is a prime.

It is a Duffinian 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, 31957009 + ... + 31957678.

It is an arithmetic number, because the mean of its divisors is an integer number (3259649088).

Almost surely, 2^21411420145 is an apocalyptic number.

It is an amenable number.

21411420145 is a deficient number, since it is larger than the sum of its proper divisors (4665772559).

21411420145 is an equidigital number, since it uses as much as digits as its factorization.

21411420145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63914759.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 21411420145 its reverse (54102411412), we get a palindrome (75513831557).

The spelling of 21411420145 in words is "twenty-one billion, four hundred eleven million, four hundred twenty thousand, one hundred forty-five".