201620101023 has 16 divisors (see below), whose sum is σ = 325850668800. Its totient is φ = 122194000440.

The previous prime is 201620101021. The next prime is 201620101049. The reversal of 201620101023 is 320101026102.

201620101023 is a `hidden beast` number, since 2 + 0 + 1 + 620 + 10 + 10 + 23 = 666.

It is not a de Polignac number, because 201620101023 - 2¹ = 201620101021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201620100987 and 201620101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201620101021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339427483 + ... + 339428076.

It is an arithmetic number, because the mean of its divisors is an integer number (20365666800).

Almost surely, 2^201620101023 is an apocalyptic number.

201620101023 is a deficient number, since it is larger than the sum of its proper divisors (124230567777).

201620101023 is a wasteful number, since it uses less digits than its factorization.

201620101023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678855579 (or 678855573 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201620101023 its reverse (320101026102), we get a palindrome (521721127125).

The spelling of 201620101023 in words is "two hundred one billion, six hundred twenty million, one hundred one thousand, twenty-three".