20154261146 has 8 divisors (see below), whose sum is σ = 30363407220. Its totient is φ = 10033125408.

The previous prime is 20154261133. The next prime is 20154261151. The reversal of 20154261146 is 64116245102.

It can be written as a sum of positive squares in 2 ways, for example, as 17619642121 + 2534619025 = 132739^2 + 50345^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 22002011 + ... + 22002926.

Almost surely, 2^20154261146 is an apocalyptic number.

20154261146 is a deficient number, since it is larger than the sum of its proper divisors (10209146074).

20154261146 is a wasteful number, since it uses less digits than its factorization.

20154261146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44005168.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 20154261146 in words is "twenty billion, one hundred fifty-four million, two hundred sixty-one thousand, one hundred forty-six".