20553250633 has 8 divisors (see below), whose sum is σ = 20714069376. Its totient is φ = 20392491600.

The previous prime is 20553250567. The next prime is 20553250637. The reversal of 20553250633 is 33605235502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20553250633 is a prime.

It is a super-3 number, since 3×20553250633³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20553250637) 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, 887623 + ... + 910483.

It is an arithmetic number, because the mean of its divisors is an integer number (2589258672).

Almost surely, 2^20553250633 is an apocalyptic number.

It is an amenable number.

20553250633 is a deficient number, since it is larger than the sum of its proper divisors (160818743).

20553250633 is a wasteful number, since it uses less digits than its factorization.

20553250633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29855.

The product of its (nonzero) digits is 81000, while the sum is 34.

The spelling of 20553250633 in words is "twenty billion, five hundred fifty-three million, two hundred fifty thousand, six hundred thirty-three".