20311100213031 has 8 divisors (see below), whose sum is σ = 30090518834160. Its totient is φ = 13540733475336.

The previous prime is 20311100212969. The next prime is 20311100213051. The reversal of 20311100213031 is 13031200111302.

20311100213031 is a `hidden beast` number, since 20 + 311 + 10 + 0 + 21 + 303 + 1 = 666.

It is not a de Polignac number, because 20311100213031 - 2¹³ = 20311100204839 is a prime.

It is a super-2 number, since 2×20311100213031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20311100212995 and 20311100213013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311100213051) 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, 376131485400 + ... + 376131485453.

It is an arithmetic number, because the mean of its divisors is an integer number (3761314854270).

Almost surely, 2^{20311100213031} is an apocalyptic number.

20311100213031 is a deficient number, since it is larger than the sum of its proper divisors (9779418621129).

20311100213031 is an equidigital number, since it uses as much as digits as its factorization.

20311100213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752262970862 (or 752262970856 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 20311100213031 its reverse (13031200111302), we get a palindrome (33342300324333).

The spelling of 20311100213031 in words is "twenty trillion, three hundred eleven billion, one hundred million, two hundred thirteen thousand, thirty-one".