20156220016407 has 24 divisors (see below), whose sum is σ = 29167583326128. Its totient is φ = 13413011040000.

The previous prime is 20156220016403. The next prime is 20156220016417. The reversal of 20156220016407 is 70461002265102.

It is a happy number.

20156220016407 is a `hidden beast` number, since 2 + 0 + 1 + 5 + 6 + 2 + 2 + 0 + 0 + 1 + 640 + 7 = 666.

It is not a de Polignac number, because 20156220016407 - 2² = 20156220016403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20156220016403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18819103 + ... + 19861295.

It is an arithmetic number, because the mean of its divisors is an integer number (1215315971922).

Almost surely, 2^{20156220016407} is an apocalyptic number.

20156220016407 is a deficient number, since it is larger than the sum of its proper divisors (9011363309721).

20156220016407 is a wasteful number, since it uses less digits than its factorization.

20156220016407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046111 (or 1046108 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 20156220016407 in words is "twenty trillion, one hundred fifty-six billion, two hundred twenty million, sixteen thousand, four hundred seven".