21410350211557 has 8 divisors (see below), whose sum is σ = 21914201085920. Its totient is φ = 20906769144240.

The previous prime is 21410350211519. The next prime is 21410350211597. The reversal of 21410350211557 is 75511205301412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21410350211557 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 (21410350211597) 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, 67291182 + ... + 67608607.

It is an arithmetic number, because the mean of its divisors is an integer number (2739275135740).

Almost surely, 2^{21410350211557} is an apocalyptic number.

It is an amenable number.

21410350211557 is a deficient number, since it is larger than the sum of its proper divisors (503850874363).

21410350211557 is a wasteful number, since it uses less digits than its factorization.

21410350211557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134903523.

The product of its (nonzero) digits is 42000, while the sum is 37.

Adding to 21410350211557 its reverse (75511205301412), we get a palindrome (96921555512969).

The spelling of 21410350211557 in words is "twenty-one trillion, four hundred ten billion, three hundred fifty million, two hundred eleven thousand, five hundred fifty-seven".