21415604141 has 4 divisors (see below), whose sum is σ = 21673623552. Its totient is φ = 21157584732.

The previous prime is 21415604101. The next prime is 21415604153. The reversal of 21415604141 is 14140651412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21415604141 - 2¹⁴ = 21415587757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21415604101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129009581 + ... + 129009746.

It is an arithmetic number, because the mean of its divisors is an integer number (5418405888).

Almost surely, 2^21415604141 is an apocalyptic number.

It is an amenable number.

21415604141 is a deficient number, since it is larger than the sum of its proper divisors (258019411).

21415604141 is an equidigital number, since it uses as much as digits as its factorization.

21415604141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258019410.

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 21415604141 in words is "twenty-one billion, four hundred fifteen million, six hundred four thousand, one hundred forty-one".