20645512101453 has 8 divisors (see below), whose sum is σ = 27528243249888. Its totient is φ = 13763227843664.

The previous prime is 20645512101449. The next prime is 20645512101563. The reversal of 20645512101453 is 35410121554602.

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 20645512101453 - 2² = 20645512101449 is a prime.

It is a super-2 number, since 2×20645512101453² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20645512101443) by changing a digit.

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, 111614850 + ... + 111799667.

It is an arithmetic number, because the mean of its divisors is an integer number (3441030406236).

Almost surely, 2^{20645512101453} is an apocalyptic number.

It is an amenable number.

20645512101453 is a deficient number, since it is larger than the sum of its proper divisors (6882731148435).

20645512101453 is a wasteful number, since it uses less digits than its factorization.

20645512101453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223445323.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 20645512101453 in words is "twenty trillion, six hundred forty-five billion, five hundred twelve million, one hundred one thousand, four hundred fifty-three".