20317755402 has 96 divisors (see below), whose sum is σ = 51017121792. Its totient is φ = 5724123552.

The previous prime is 20317755401. The next prime is 20317755439. The reversal of 20317755402 is 20455771302.

20317755402 is a `hidden beast` number, since 2 + 0 + 31 + 77 + 554 + 0 + 2 = 666.

It is a super-2 number, since 2×20317755402² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20317755401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2668533 + ... + 2676135.

It is an arithmetic number, because the mean of its divisors is an integer number (531428352).

Almost surely, 2^20317755402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20317755402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25508560896).

20317755402 is an abundant number, since it is smaller than the sum of its proper divisors (30699366390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20317755402 is a wasteful number, since it uses less digits than its factorization.

20317755402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7912 (or 7909 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The spelling of 20317755402 in words is "twenty billion, three hundred seventeen million, seven hundred fifty-five thousand, four hundred two".