2123816877 has 24 divisors (see below), whose sum is σ = 3775675904. Its totient is φ = 1120254624.

The previous prime is 2123816873. The next prime is 2123816897. The reversal of 2123816877 is 7786183212.

It is not a de Polignac number, because 2123816877 - 2² = 2123816873 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123816873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1295773 + ... + 1297410.

Almost surely, 2^2123816877 is an apocalyptic number.

It is an amenable number.

2123816877 is a deficient number, since it is larger than the sum of its proper divisors (1651859027).

2123816877 is a wasteful number, since it uses less digits than its factorization.

2123816877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593209 (or 2593206 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 2123816877 is about 46084.8877290593. The cubic root of 2123816877 is about 1285.4021516312.

The spelling of 2123816877 in words is "two billion, one hundred twenty-three million, eight hundred sixteen thousand, eight hundred seventy-seven".