20213145131 has 8 divisors (see below), whose sum is σ = 21180234240. Its totient is φ = 19253410792.

The previous prime is 20213145107. The next prime is 20213145137. The reversal of 20213145131 is 13154131202.

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 20213145131 - 2³⁰ = 19139403307 is a prime.

It is a super-2 number, since 2×20213145131² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213145097 and 20213145106.

It is not an unprimeable number, because it can be changed into a prime (20213145137) 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 7 ways as a sum of consecutive naturals, for example, 1833065 + ... + 1844058.

It is an arithmetic number, because the mean of its divisors is an integer number (2647529280).

Almost surely, 2^20213145131 is an apocalyptic number.

20213145131 is a deficient number, since it is larger than the sum of its proper divisors (967089109).

20213145131 is a wasteful number, since it uses less digits than its factorization.

20213145131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677385.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 20213145131 its reverse (13154131202), we get a palindrome (33367276333).

The spelling of 20213145131 in words is "twenty billion, two hundred thirteen million, one hundred forty-five thousand, one hundred thirty-one".