21400555442053 has 8 divisors (see below), whose sum is σ = 22138571980800. Its totient is φ = 20662543326768.

The previous prime is 21400555442051. The next prime is 21400555442059. The reversal of 21400555442053 is 35024455500412.

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 21400555442053 - 2¹ = 21400555442051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21400555441997 and 21400555442015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400555442051) 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, 10973308 + ... + 12775546.

It is an arithmetic number, because the mean of its divisors is an integer number (2767321497600).

Almost surely, 2^{21400555442053} is an apocalyptic number.

It is an amenable number.

21400555442053 is a deficient number, since it is larger than the sum of its proper divisors (738016538747).

21400555442053 is a wasteful number, since it uses less digits than its factorization.

21400555442053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211731.

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 21400555442053 in words is "twenty-one trillion, four hundred billion, five hundred fifty-five million, four hundred forty-two thousand, fifty-three".