20102120023 has 12 divisors (see below), whose sum is σ = 21273759840. Its totient is φ = 18992097216.

The previous prime is 20102119997. The next prime is 20102120057. The reversal of 20102120023 is 32002120102.

It is not a de Polignac number, because 20102120023 - 2²⁹ = 19565249111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102119985 and 20102120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102120063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56623 + ... + 208351.

It is an arithmetic number, because the mean of its divisors is an integer number (1772813320).

Almost surely, 2^20102120023 is an apocalyptic number.

20102120023 is a deficient number, since it is larger than the sum of its proper divisors (1171639817).

20102120023 is a wasteful number, since it uses less digits than its factorization.

20102120023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152134 (or 152115 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20102120023 its reverse (32002120102), we get a palindrome (52104240125).

The spelling of 20102120023 in words is "twenty billion, one hundred two million, one hundred twenty thousand, twenty-three".