20400311230 has 16 divisors (see below), whose sum is σ = 39545218944. Its totient is φ = 7532422560.

The previous prime is 20400311227. The next prime is 20400311237. The reversal of 20400311230 is 3211300402.

It is a happy number.

It is a super-2 number, since 2×20400311230² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400311237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78462606 + ... + 78462865.

It is an arithmetic number, because the mean of its divisors is an integer number (2471576184).

Almost surely, 2^20400311230 is an apocalyptic number.

20400311230 is a deficient number, since it is larger than the sum of its proper divisors (19144907714).

20400311230 is a wasteful number, since it uses less digits than its factorization.

20400311230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156925491.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20400311230 its reverse (3211300402), we get a palindrome (23611611632).

The spelling of 20400311230 in words is "twenty billion, four hundred million, three hundred eleven thousand, two hundred thirty".