20432121131 has 8 divisors (see below), whose sum is σ = 20524705344. Its totient is φ = 20339579200.

The previous prime is 20432121119. The next prime is 20432121163. The reversal of 20432121131 is 13112123402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20432121131 is a prime.

It is a super-2 number, since 2×20432121131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20432121191) 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, 1345481 + ... + 1360581.

It is an arithmetic number, because the mean of its divisors is an integer number (2565588168).

Almost surely, 2^20432121131 is an apocalyptic number.

20432121131 is a deficient number, since it is larger than the sum of its proper divisors (92584213).

20432121131 is a wasteful number, since it uses less digits than its factorization.

20432121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21141.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20432121131 its reverse (13112123402), we get a palindrome (33544244533).

The spelling of 20432121131 in words is "twenty billion, four hundred thirty-two million, one hundred twenty-one thousand, one hundred thirty-one".