20123212293 has 16 divisors (see below), whose sum is σ = 29827924800. Its totient is φ = 13408383600.

The previous prime is 20123212289. The next prime is 20123212327. The reversal of 20123212293 is 39221232102.

20123212293 is a `hidden beast` number, since 201 + 232 + 1 + 229 + 3 = 666.

It is not a de Polignac number, because 20123212293 - 2² = 20123212289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123212243) 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, 144703 + ... + 247356.

It is an arithmetic number, because the mean of its divisors is an integer number (1864245300).

Almost surely, 2^20123212293 is an apocalyptic number.

It is an amenable number.

20123212293 is a deficient number, since it is larger than the sum of its proper divisors (9704712507).

20123212293 is a wasteful number, since it uses less digits than its factorization.

20123212293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393969 (or 393963 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 20123212293 its reverse (39221232102), we get a palindrome (59344444395).

The spelling of 20123212293 in words is "twenty billion, one hundred twenty-three million, two hundred twelve thousand, two hundred ninety-three".