20556153703 has 2 divisors, whose sum is σ = 20556153704. Its totient is φ = 20556153702.

The previous prime is 20556153701. The next prime is 20556153707. The reversal of 20556153703 is 30735165502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20556153703 - 2¹ = 20556153701 is a prime.

It is a super-2 number, since 2×20556153703² (a number of 21 digits) contains 22 as substring.

Together with 20556153701, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20556153701) 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 as a sum of consecutive naturals, namely, 10278076851 + 10278076852.

It is an arithmetic number, because the mean of its divisors is an integer number (10278076852).

Almost surely, 2^20556153703 is an apocalyptic number.

20556153703 is a deficient number, since it is larger than the sum of its proper divisors (1).

20556153703 is an equidigital number, since it uses as much as digits as its factorization.

20556153703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94500, while the sum is 37.

The spelling of 20556153703 in words is "twenty billion, five hundred fifty-six million, one hundred fifty-three thousand, seven hundred three".