20351834 has 4 divisors (see below), whose sum is σ = 30527754. Its totient is φ = 10175916.

The previous prime is 20351827. The next prime is 20351843. The reversal of 20351834 is 43815302.

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., 18515809 + 1836025 = 4303^2 + 1355^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5087957 + ... + 5087960.

Almost surely, 2^20351834 is an apocalyptic number.

20351834 is a deficient number, since it is larger than the sum of its proper divisors (10175920).

20351834 is a wasteful number, since it uses less digits than its factorization.

20351834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10175919.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20351834 is about 4511.3006993549. The cubic root of 20351834 is about 273.0242255557.

The spelling of 20351834 in words is "twenty million, three hundred fifty-one thousand, eight hundred thirty-four".