20154042312 has 32 divisors (see below), whose sum is σ = 50484124800. Its totient is φ = 6704811584.

The previous prime is 20154042301. The next prime is 20154042313. The reversal of 20154042312 is 21324045102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20154042313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812688 + ... + 837119.

It is an arithmetic number, because the mean of its divisors is an integer number (1577628900).

Almost surely, 2^20154042312 is an apocalyptic number.

It is an amenable number.

20154042312 is an abundant number, since it is smaller than the sum of its proper divisors (30330082488).

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

20154042312 is a wasteful number, since it uses less digits than its factorization.

20154042312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650325 (or 1650321 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20154042312 its reverse (21324045102), we get a palindrome (41478087414).

The spelling of 20154042312 in words is "twenty billion, one hundred fifty-four million, forty-two thousand, three hundred twelve".