20345402234 has 32 divisors (see below), whose sum is σ = 31408819200. Its totient is φ = 9880627120.

The previous prime is 20345402219. The next prime is 20345402237. The reversal of 20345402234 is 43220454302.

It is a happy number.

It is a super-3 number, since 3×20345402234³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20345402197 and 20345402206.

It is not an unprimeable number, because it can be changed into a prime (20345402237) 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, 3691709 + ... + 3697215.

It is an arithmetic number, because the mean of its divisors is an integer number (981525600).

Almost surely, 2^20345402234 is an apocalyptic number.

20345402234 is a deficient number, since it is larger than the sum of its proper divisors (11063416966).

20345402234 is a wasteful number, since it uses less digits than its factorization.

20345402234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5938.

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 20345402234 its reverse (43220454302), we get a palindrome (63565856536).

The spelling of 20345402234 in words is "twenty billion, three hundred forty-five million, four hundred two thousand, two hundred thirty-four".