20235431432 has 16 divisors (see below), whose sum is σ = 40173283260. Its totient is φ = 9522555904.

The previous prime is 20235431431. The next prime is 20235431453. The reversal of 20235431432 is 23413453202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16927571236 + 3307860196 = 130106^2 + 57514^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20235431395 and 20235431404.

It is not an unprimeable number, because it can be changed into a prime (20235431431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74394833 + ... + 74395104.

Almost surely, 2^20235431432 is an apocalyptic number.

It is an amenable number.

20235431432 is a deficient number, since it is larger than the sum of its proper divisors (19937851828).

20235431432 is a wasteful number, since it uses less digits than its factorization.

20235431432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148789960 (or 148789956 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 20235431432 its reverse (23413453202), we get a palindrome (43648884634).

The spelling of 20235431432 in words is "twenty billion, two hundred thirty-five million, four hundred thirty-one thousand, four hundred thirty-two".