20051302155 has 16 divisors (see below), whose sum is σ = 32083923744. Its totient is φ = 10693414400.

The previous prime is 20051302147. The next prime is 20051302157. The reversal of 20051302155 is 55120315002.

It is a happy number.

It is not a de Polignac number, because 20051302155 - 2³ = 20051302147 is a prime.

It is a super-2 number, since 2×20051302155² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20051302157) 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 15 ways as a sum of consecutive naturals, for example, 377077 + ... + 426953.

It is an arithmetic number, because the mean of its divisors is an integer number (2005245234).

Almost surely, 2^20051302155 is an apocalyptic number.

20051302155 is a deficient number, since it is larger than the sum of its proper divisors (12032621589).

20051302155 is a wasteful number, since it uses less digits than its factorization.

20051302155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76686.

The product of its (nonzero) digits is 1500, while the sum is 24.

Adding to 20051302155 its reverse (55120315002), we get a palindrome (75171617157).

The spelling of 20051302155 in words is "twenty billion, fifty-one million, three hundred two thousand, one hundred fifty-five".