20403313738155 has 48 divisors (see below), whose sum is σ = 36587098416960. Its totient is φ = 10506003782400.

The previous prime is 20403313738139. The next prime is 20403313738163. The reversal of 20403313738155 is 55183731330402.

20403313738155 is a `hidden beast` number, since 2 + 0 + 403 + 31 + 37 + 38 + 155 = 666.

It is not a de Polignac number, because 20403313738155 - 2⁴ = 20403313738139 is a prime.

It is a super-2 number, since 2×20403313738155² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20403313738155.

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 47 ways as a sum of consecutive naturals, for example, 26160690 + ... + 26929320.

It is an arithmetic number, because the mean of its divisors is an integer number (762231217020).

Almost surely, 2^{20403313738155} is an apocalyptic number.

20403313738155 is a deficient number, since it is larger than the sum of its proper divisors (16183784678805).

20403313738155 is a wasteful number, since it uses less digits than its factorization.

20403313738155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789012 (or 789009 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 20403313738155 in words is "twenty trillion, four hundred three billion, three hundred thirteen million, seven hundred thirty-eight thousand, one hundred fifty-five".