20312001223154 has 32 divisors (see below), whose sum is σ = 32704425157680. Its totient is φ = 9426995730432.

The previous prime is 20312001222977. The next prime is 20312001223159. The reversal of 20312001223154 is 45132210021302.

It can be written as a sum of positive squares in 8 ways, for example, as 13807578381025 + 6504422842129 = 3715855^2 + 2550377^2 .

It is not an unprimeable number, because it can be changed into a prime (20312001223159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36489632 + ... + 37042100.

Almost surely, 2^{20312001223154} is an apocalyptic number.

20312001223154 is a deficient number, since it is larger than the sum of its proper divisors (12392423934526).

20312001223154 is a wasteful number, since it uses less digits than its factorization.

20312001223154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567374.

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

Adding to 20312001223154 its reverse (45132210021302), we get a palindrome (65444211244456).

The spelling of 20312001223154 in words is "twenty trillion, three hundred twelve billion, one million, two hundred twenty-three thousand, one hundred fifty-four".