202123066436 has 6 divisors (see below), whose sum is σ = 353715366270. Its totient is φ = 101061533216.

The previous prime is 202123066393. The next prime is 202123066547. The reversal of 202123066436 is 634660321202.

It can be written as a sum of positive squares in only one way, i.e., 199952065600 + 2171000836 = 447160^2 + 46594^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202123066396 and 202123066405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25265383301 + ... + 25265383308.

It is an arithmetic number, because the mean of its divisors is an integer number (58952561045).

Almost surely, 2^202123066436 is an apocalyptic number.

It is an amenable number.

202123066436 is a deficient number, since it is larger than the sum of its proper divisors (151592299834).

202123066436 is a wasteful number, since it uses less digits than its factorization.

202123066436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50530766613 (or 50530766611 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

Adding to 202123066436 its reverse (634660321202), we get a palindrome (836783387638).

The spelling of 202123066436 in words is "two hundred two billion, one hundred twenty-three million, sixty-six thousand, four hundred thirty-six".