20551651135 has 8 divisors (see below), whose sum is σ = 26112686256. Its totient is φ = 15474184320.

The previous prime is 20551651117. The next prime is 20551651139. The reversal of 20551651135 is 53115615502.

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

It is not a de Polignac number, because 20551651135 - 2⁷ = 20551651007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20551651135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551651139) 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, 120891981 + ... + 120892150.

It is an arithmetic number, because the mean of its divisors is an integer number (3264085782).

Almost surely, 2^20551651135 is an apocalyptic number.

20551651135 is a deficient number, since it is larger than the sum of its proper divisors (5561035121).

20551651135 is a wasteful number, since it uses less digits than its factorization.

20551651135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241784153.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 20551651135 in words is "twenty billion, five hundred fifty-one million, six hundred fifty-one thousand, one hundred thirty-five".