21020005142341 has 16 divisors (see below), whose sum is σ = 22826724595200. Its totient is φ = 19307604456000.

The previous prime is 21020005142321. The next prime is 21020005142351. The reversal of 21020005142341 is 14324150002012.

It is not a de Polignac number, because 21020005142341 - 2²³ = 21019996753733 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 (21020005142321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198095610 + ... + 198201691.

It is an arithmetic number, because the mean of its divisors is an integer number (1426670287200).

Almost surely, 2^{21020005142341} is an apocalyptic number.

It is an amenable number.

21020005142341 is a deficient number, since it is larger than the sum of its proper divisors (1806719452859).

21020005142341 is a wasteful number, since it uses less digits than its factorization.

21020005142341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396297420.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21020005142341 its reverse (14324150002012), we get a palindrome (35344155144353).

The spelling of 21020005142341 in words is "twenty-one trillion, twenty billion, five million, one hundred forty-two thousand, three hundred forty-one".