20576434 has 4 divisors (see below), whose sum is σ = 30864654. Its totient is φ = 10288216.

The previous prime is 20576407. The next prime is 20576471. The reversal of 20576434 is 43467502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17347225 + 3229209 = 4165^2 + 1797^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20576396 and 20576405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5144107 + ... + 5144110.

Almost surely, 2^20576434 is an apocalyptic number.

20576434 is a deficient number, since it is larger than the sum of its proper divisors (10288220).

20576434 is a wasteful number, since it uses less digits than its factorization.

20576434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10288219.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 20576434 is about 4536.1254391827. The cubic root of 20576434 is about 274.0249058292.

The spelling of 20576434 in words is "twenty million, five hundred seventy-six thousand, four hundred thirty-four".