20121434 has 8 divisors (see below), whose sum is σ = 30374868. Its totient is φ = 9996480.

The previous prime is 20121433. The next prime is 20121467. The reversal of 20121434 is 43412102.

It can be written as a sum of positive squares in 2 ways, for example, as 19404025 + 717409 = 4405^2 + 847^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20121433) 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, 31727 + ... + 32354.

Almost surely, 2^20121434 is an apocalyptic number.

20121434 is a deficient number, since it is larger than the sum of its proper divisors (10253434).

20121434 is a wasteful number, since it uses less digits than its factorization.

20121434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64240.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20121434 is about 4485.6921428025. The cubic root of 20121434 is about 271.9900245044.

Adding to 20121434 its reverse (43412102), we get a palindrome (63533536).

The spelling of 20121434 in words is "twenty million, one hundred twenty-one thousand, four hundred thirty-four".