20213533131 has 16 divisors (see below), whose sum is σ = 30027068928. Its totient is φ = 11989973600.

The previous prime is 20213533129. The next prime is 20213533139. The reversal of 20213533131 is 13133531202.

It is not a de Polignac number, because 20213533131 - 2¹ = 20213533129 is a prime.

It is a super-2 number, since 2×20213533131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20213533139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6514740 + ... + 6517841.

It is an arithmetic number, because the mean of its divisors is an integer number (1876691808).

Almost surely, 2^20213533131 is an apocalyptic number.

20213533131 is a deficient number, since it is larger than the sum of its proper divisors (9813535797).

20213533131 is a wasteful number, since it uses less digits than its factorization.

20213533131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13032642.

The product of its (nonzero) digits is 1620, while the sum is 24.

The spelling of 20213533131 in words is "twenty billion, two hundred thirteen million, five hundred thirty-three thousand, one hundred thirty-one".