20205156007 has 16 divisors (see below), whose sum is σ = 21016568320. Its totient is φ = 19410777792.

The previous prime is 20205156001. The next prime is 20205156011. The reversal of 20205156007 is 70065150202.

It is a cyclic number.

It is not a de Polignac number, because 20205156007 - 2¹¹ = 20205153959 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 (20205156001) 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 in 15 ways as a sum of consecutive naturals, for example, 1143244 + ... + 1160782.

It is an arithmetic number, because the mean of its divisors is an integer number (1313535520).

Almost surely, 2^20205156007 is an apocalyptic number.

20205156007 is a deficient number, since it is larger than the sum of its proper divisors (811412313).

20205156007 is a wasteful number, since it uses less digits than its factorization.

20205156007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18022.

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 20205156007 in words is "twenty billion, two hundred five million, one hundred fifty-six thousand, seven".