20145435434 has 4 divisors (see below), whose sum is σ = 30218153154. Its totient is φ = 10072717716.

The previous prime is 20145435413. The next prime is 20145435493. The reversal of 20145435434 is 43453454102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43453454102 = 2 ⋅21726727051.

It can be written as a sum of positive squares in only one way, i.e., 19238522209 + 906913225 = 138703^2 + 30115^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20145435394 and 20145435403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5036358857 + ... + 5036358860.

Almost surely, 2^20145435434 is an apocalyptic number.

20145435434 is a deficient number, since it is larger than the sum of its proper divisors (10072717720).

20145435434 is a wasteful number, since it uses less digits than its factorization.

20145435434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10072717719.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 20145435434 its reverse (43453454102), we get a palindrome (63598889536).

The spelling of 20145435434 in words is "twenty billion, one hundred forty-five million, four hundred thirty-five thousand, four hundred thirty-four".