20431834 has 8 divisors (see below), whose sum is σ = 31704660. Its totient is φ = 9863616.

The previous prime is 20431813. The next prime is 20431847. The reversal of 20431834 is 43813402.

20431834 = 47² + 48² + ... + 394².

It can be written as a sum of positive squares in 2 ways, for example, as 18020025 + 2411809 = 4245^2 + 1553^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20431799 and 20431808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176079 + ... + 176194.

Almost surely, 2^20431834 is an apocalyptic number.

20431834 is a deficient number, since it is larger than the sum of its proper divisors (11272826).

20431834 is a wasteful number, since it uses less digits than its factorization.

20431834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352304.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20431834 is about 4520.1586255352. The cubic root of 20431834 is about 273.3814968997.

The spelling of 20431834 in words is "twenty million, four hundred thirty-one thousand, eight hundred thirty-four".