21602427434045 has 8 divisors (see below), whose sum is σ = 25923252157440. Its totient is φ = 17281715789520.

The previous prime is 21602427433981. The next prime is 21602427434053. The reversal of 21602427434045 is 54043472420612.

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

It is not a de Polignac number, because 21602427434045 - 2⁶ = 21602427433981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21602427433987 and 21602427434005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27848861 + ... + 28614050.

It is an arithmetic number, because the mean of its divisors is an integer number (3240406519680).

Almost surely, 2^{21602427434045} is an apocalyptic number.

It is an amenable number.

21602427434045 is a deficient number, since it is larger than the sum of its proper divisors (4320824723395).

21602427434045 is an equidigital number, since it uses as much as digits as its factorization.

21602427434045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56539435.

The product of its (nonzero) digits is 1290240, while the sum is 44.

Adding to 21602427434045 its reverse (54043472420612), we get a palindrome (75645899854657).

The spelling of 21602427434045 in words is "twenty-one trillion, six hundred two billion, four hundred twenty-seven million, four hundred thirty-four thousand, forty-five".