21465426641 has 8 divisors (see below), whose sum is σ = 21712204800. Its totient is φ = 21218772960.

The previous prime is 21465426629. The next prime is 21465426659. The reversal of 21465426641 is 14662456412.

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 21465426641 - 2²⁶ = 21398317777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21465726641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341156 + ... + 399146.

It is an arithmetic number, because the mean of its divisors is an integer number (2714025600).

Almost surely, 2^21465426641 is an apocalyptic number.

It is an amenable number.

21465426641 is a deficient number, since it is larger than the sum of its proper divisors (246778159).

21465426641 is an equidigital number, since it uses as much as digits as its factorization.

21465426641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62239.

The product of its digits is 276480, while the sum is 41.

The spelling of 21465426641 in words is "twenty-one billion, four hundred sixty-five million, four hundred twenty-six thousand, six hundred forty-one".