20452354213605 has 32 divisors (see below), whose sum is σ = 33266925566208. Its totient is φ = 10726941388800.

The previous prime is 20452354213583. The next prime is 20452354213639. The reversal of 20452354213605 is 50631245325402.

It is not a de Polignac number, because 20452354213605 - 2⁶ = 20452354213541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2294725 + ... + 6794885.

It is an arithmetic number, because the mean of its divisors is an integer number (1039591423944).

Almost surely, 2^{20452354213605} is an apocalyptic number.

It is an amenable number.

20452354213605 is a deficient number, since it is larger than the sum of its proper divisors (12814571352603).

20452354213605 is a wasteful number, since it uses less digits than its factorization.

20452354213605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505197.

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 20452354213605 in words is "twenty trillion, four hundred fifty-two billion, three hundred fifty-four million, two hundred thirteen thousand, six hundred five".