20554243735 has 4 divisors (see below), whose sum is σ = 24665092488. Its totient is φ = 16443394984.

The previous prime is 20554243729. The next prime is 20554243741. The reversal of 20554243735 is 53734245502.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20554243729) and next prime (20554243741).

It is a cyclic number.

It is not a de Polignac number, because 20554243735 - 2³ = 20554243727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2055424369 + ... + 2055424378.

It is an arithmetic number, because the mean of its divisors is an integer number (6166273122).

Almost surely, 2^20554243735 is an apocalyptic number.

20554243735 is a deficient number, since it is larger than the sum of its proper divisors (4110848753).

20554243735 is an equidigital number, since it uses as much as digits as its factorization.

20554243735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110848752.

The product of its (nonzero) digits is 504000, while the sum is 40.

The spelling of 20554243735 in words is "twenty billion, five hundred fifty-four million, two hundred forty-three thousand, seven hundred thirty-five".