20012231999 has 16 divisors (see below), whose sum is σ = 20503445760. Its totient is φ = 19525509120.

The previous prime is 20012231959. The next prime is 20012232013. The reversal of 20012231999 is 99913221002.

It is a cyclic number.

It is not a de Polignac number, because 20012231999 - 2¹² = 20012227903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012231909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13906322 + ... + 13907760.

It is an arithmetic number, because the mean of its divisors is an integer number (1281465360).

Almost surely, 2^20012231999 is an apocalyptic number.

20012231999 is a deficient number, since it is larger than the sum of its proper divisors (491213761).

20012231999 is a wasteful number, since it uses less digits than its factorization.

20012231999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 20012231999 in words is "twenty billion, twelve million, two hundred thirty-one thousand, nine hundred ninety-nine".