20533208653573 has 8 divisors (see below), whose sum is σ = 25599844555200. Its totient is φ = 15999902846880.

The previous prime is 20533208653571. The next prime is 20533208653589. The reversal of 20533208653573 is 37535680233502.

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 20533208653573 - 2¹ = 20533208653571 is a prime.

It is a super-2 number, since 2×20533208653573² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20533208653573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533208653571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133332523648 + ... + 133332523801.

It is an arithmetic number, because the mean of its divisors is an integer number (3199980569400).

Almost surely, 2^{20533208653573} is an apocalyptic number.

It is an amenable number.

20533208653573 is a deficient number, since it is larger than the sum of its proper divisors (5066635901627).

20533208653573 is a wasteful number, since it uses less digits than its factorization.

20533208653573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266665047467.

The product of its (nonzero) digits is 13608000, while the sum is 52.

The spelling of 20533208653573 in words is "twenty trillion, five hundred thirty-three billion, two hundred eight million, six hundred fifty-three thousand, five hundred seventy-three".