20120030042 has 12 divisors (see below), whose sum is σ = 35107399530. Its totient is φ = 8622869976.

The previous prime is 20120030039. The next prime is 20120030129. The reversal of 20120030042 is 24003002102.

It can be written as a sum of positive squares in only one way, i.e., 19176987361 + 943042681 = 138481^2 + 30709^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20120029999 and 20120030026.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102653117 + ... + 102653312.

Almost surely, 2^20120030042 is an apocalyptic number.

20120030042 is a deficient number, since it is larger than the sum of its proper divisors (14987369488).

20120030042 is a wasteful number, since it uses less digits than its factorization.

20120030042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205306445 (or 205306438 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 20120030042 its reverse (24003002102), we get a palindrome (44123032144).

The spelling of 20120030042 in words is "twenty billion, one hundred twenty million, thirty thousand, forty-two".