20007212755 has 16 divisors (see below), whose sum is σ = 24159711744. Its totient is φ = 15905243520.

The previous prime is 20007212741. The next prime is 20007212809. The reversal of 20007212755 is 55721270002.

It is not a de Polignac number, because 20007212755 - 2⁹ = 20007212243 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 941629 + ... + 962641.

It is an arithmetic number, because the mean of its divisors is an integer number (1509981984).

Almost surely, 2^20007212755 is an apocalyptic number.

20007212755 is a deficient number, since it is larger than the sum of its proper divisors (4152498989).

20007212755 is a wasteful number, since it uses less digits than its factorization.

20007212755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22206.

The product of its (nonzero) digits is 9800, while the sum is 31.

Adding to 20007212755 its reverse (55721270002), we get a palindrome (75728482757).

The spelling of 20007212755 in words is "twenty billion, seven million, two hundred twelve thousand, seven hundred fifty-five".