21602532454401 has 16 divisors (see below), whose sum is σ = 28809982800000. Its totient is φ = 14398385539200.

The previous prime is 21602532454381. The next prime is 21602532454457. The reversal of 21602532454401 is 10445423520612.

It is not a de Polignac number, because 21602532454401 - 2¹¹ = 21602532452353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21602532454401.

It is not an unprimeable number, because it can be changed into a prime (21602532454001) 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, 384023725 + ... + 384079973.

It is an arithmetic number, because the mean of its divisors is an integer number (1800623925000).

Almost surely, 2^{21602532454401} is an apocalyptic number.

It is an amenable number.

21602532454401 is a deficient number, since it is larger than the sum of its proper divisors (7207450345599).

21602532454401 is a wasteful number, since it uses less digits than its factorization.

21602532454401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83336.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 21602532454401 in words is "twenty-one trillion, six hundred two billion, five hundred thirty-two million, four hundred fifty-four thousand, four hundred one".