20311140642630 has 16 divisors (see below), whose sum is σ = 48746737542384. Its totient is φ = 5416304171360.

The previous prime is 20311140642619. The next prime is 20311140642691. The reversal of 20311140642630 is 3624604111302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20311140642591 and 20311140642600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338519010681 + ... + 338519010740.

It is an arithmetic number, because the mean of its divisors is an integer number (3046671096399).

Almost surely, 2^{20311140642630} is an apocalyptic number.

20311140642630 is an abundant number, since it is smaller than the sum of its proper divisors (28435596899754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311140642630 is a wasteful number, since it uses less digits than its factorization.

20311140642630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677038021431.

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 20311140642630 its reverse (3624604111302), we get a palindrome (23935744753932).

The spelling of 20311140642630 in words is "twenty trillion, three hundred eleven billion, one hundred forty million, six hundred forty-two thousand, six hundred thirty".