20556700253 has 8 divisors (see below), whose sum is σ = 21737377536. Its totient is φ = 19408370400.

The previous prime is 20556700231. The next prime is 20556700301. The reversal of 20556700253 is 35200765502.

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-20556700253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20556700753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8085551 + ... + 8088092.

It is an arithmetic number, because the mean of its divisors is an integer number (2717172192).

Almost surely, 2^20556700253 is an apocalyptic number.

It is an amenable number.

20556700253 is a deficient number, since it is larger than the sum of its proper divisors (1180677283).

20556700253 is a wasteful number, since it uses less digits than its factorization.

20556700253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16173715.

The product of its (nonzero) digits is 63000, while the sum is 35.

The spelling of 20556700253 in words is "twenty billion, five hundred fifty-six million, seven hundred thousand, two hundred fifty-three".