20120204232787 has 2 divisors, whose sum is σ = 20120204232788. Its totient is φ = 20120204232786.

The previous prime is 20120204232761. The next prime is 20120204232923. The reversal of 20120204232787 is 78723240202102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120204232787 is a prime.

It is a super-2 number, since 2×20120204232787² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20120204232287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060102116393 + 10060102116394.

It is an arithmetic number, because the mean of its divisors is an integer number (10060102116394).

Almost surely, 2^{20120204232787} is an apocalyptic number.

20120204232787 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120204232787 is an equidigital number, since it uses as much as digits as its factorization.

20120204232787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 40.

Adding to 20120204232787 its reverse (78723240202102), we get a palindrome (98843444434889).

The spelling of 20120204232787 in words is "twenty trillion, one hundred twenty billion, two hundred four million, two hundred thirty-two thousand, seven hundred eighty-seven".