20011890234 has 16 divisors (see below), whose sum is σ = 45741463488. Its totient is φ = 5717682912.

The previous prime is 20011890179. The next prime is 20011890247. The reversal of 20011890234 is 43209811002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238236747 + ... + 238236830.

It is an arithmetic number, because the mean of its divisors is an integer number (2858841468).

Almost surely, 2^20011890234 is an apocalyptic number.

20011890234 is an abundant number, since it is smaller than the sum of its proper divisors (25729573254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011890234 is a wasteful number, since it uses less digits than its factorization.

20011890234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476473589.

The product of its (nonzero) digits is 3456, while the sum is 30.

The spelling of 20011890234 in words is "twenty billion, eleven million, eight hundred ninety thousand, two hundred thirty-four".