20120434 has 4 divisors (see below), whose sum is σ = 30180654. Its totient is φ = 10060216.

The previous prime is 20120407. The next prime is 20120437. The reversal of 20120434 is 43402102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43402102 = 2 ⋅21701051.

It can be written as a sum of positive squares in only one way, i.e., 17247409 + 2873025 = 4153^2 + 1695^2 .

It is not an unprimeable number, because it can be changed into a prime (20120437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030107 + ... + 5030110.

Almost surely, 2^20120434 is an apocalyptic number.

20120434 is a deficient number, since it is larger than the sum of its proper divisors (10060220).

20120434 is a wasteful number, since it uses less digits than its factorization.

20120434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060219.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20120434 is about 4485.5806758992. The cubic root of 20120434 is about 271.9855186206.

Adding to 20120434 its reverse (43402102), we get a palindrome (63522536).

The spelling of 20120434 in words is "twenty million, one hundred twenty thousand, four hundred thirty-four".