20123022394 has 4 divisors (see below), whose sum is σ = 30184533594. Its totient is φ = 10061511196.

The previous prime is 20123022329. The next prime is 20123022397. The reversal of 20123022394 is 49322032102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18323141769 + 1799880625 = 135363^2 + 42425^2 .

It is a super-3 number, since 3×20123022394³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20123022397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030755597 + ... + 5030755600.

Almost surely, 2^20123022394 is an apocalyptic number.

20123022394 is a deficient number, since it is larger than the sum of its proper divisors (10061511200).

20123022394 is a wasteful number, since it uses less digits than its factorization.

20123022394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10061511199.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 20123022394 its reverse (49322032102), we get a palindrome (69445054496).

The spelling of 20123022394 in words is "twenty billion, one hundred twenty-three million, twenty-two thousand, three hundred ninety-four".