21452025255342 has 64 divisors (see below), whose sum is σ = 46864411792128. Its totient is φ = 6492284480000.

The previous prime is 21452025255307. The next prime is 21452025255343. The reversal of 21452025255342 is 24355252025412.

It is a junction number, because it is equal to n+sod(n) for n = 21452025255294 and 21452025255303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452025255343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295035592 + ... + 295108292.

It is an arithmetic number, because the mean of its divisors is an integer number (732256434252).

Almost surely, 2^{21452025255342} is an apocalyptic number.

21452025255342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21452025255342 is an abundant number, since it is smaller than the sum of its proper divisors (25412386536786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21452025255342 is a wasteful number, since it uses less digits than its factorization.

21452025255342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78385.

The product of its (nonzero) digits is 960000, while the sum is 42.

The spelling of 21452025255342 in words is "twenty-one trillion, four hundred fifty-two billion, twenty-five million, two hundred fifty-five thousand, three hundred forty-two".