20031002120 has 32 divisors (see below), whose sum is σ = 45318775320. Its totient is φ = 7968130560.

The previous prime is 20031002113. The next prime is 20031002171. The reversal of 20031002120 is 2120013002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3443107684 + 16587894436 = 58678^2 + 128794^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376117 + ... + 1390596.

Almost surely, 2^20031002120 is an apocalyptic number.

20031002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031002120 is an abundant number, since it is smaller than the sum of its proper divisors (25287773200).

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

20031002120 is a wasteful number, since it uses less digits than its factorization.

20031002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766905 (or 2766901 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20031002120 its reverse (2120013002), we get a palindrome (22151015122).

The spelling of 20031002120 in words is "twenty billion, thirty-one million, two thousand, one hundred twenty".