20351655551111 has 8 divisors (see below), whose sum is σ = 20359066503504. Its totient is φ = 20344245102720.

The previous prime is 20351655551107. The next prime is 20351655551137. The reversal of 20351655551111 is 11115555615302.

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

It is a cyclic number.

It is not a de Polignac number, because 20351655551111 - 2² = 20351655551107 is a prime.

It is a super-2 number, since 2×20351655551111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351655551411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93027791 + ... + 93246303.

It is an arithmetic number, because the mean of its divisors is an integer number (2544883312938).

Almost surely, 2^{20351655551111} is an apocalyptic number.

20351655551111 is a deficient number, since it is larger than the sum of its proper divisors (7410952393).

20351655551111 is a wasteful number, since it uses less digits than its factorization.

20351655551111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252001.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 20351655551111 in words is "twenty trillion, three hundred fifty-one billion, six hundred fifty-five million, five hundred fifty-one thousand, one hundred eleven".