20435434 has 16 divisors (see below), whose sum is σ = 31124736. Its totient is φ = 10062000.

The previous prime is 20435423. The next prime is 20435447. The reversal of 20435434 is 43453402.

It is a junction number, because it is equal to n+sod(n) for n = 20435399 and 20435408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47199 + ... + 47629.

It is an arithmetic number, because the mean of its divisors is an integer number (1945296).

Almost surely, 2^20435434 is an apocalyptic number.

20435434 is a deficient number, since it is larger than the sum of its proper divisors (10689302).

20435434 is a wasteful number, since it uses less digits than its factorization.

20435434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 20435434 is about 4520.5568241092. The cubic root of 20435434 is about 273.3975521657.

Adding to 20435434 its reverse (43453402), we get a palindrome (63888836).

The spelling of 20435434 in words is "twenty million, four hundred thirty-five thousand, four hundred thirty-four".