20311140402 has 48 divisors (see below), whose sum is σ = 50402094912. Its totient is φ = 5790739680.

The previous prime is 20311140373. The next prime is 20311140413. The reversal of 20311140402 is 20404111302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113749 + ... + 231432.

It is an arithmetic number, because the mean of its divisors is an integer number (1050043644).

Almost surely, 2^20311140402 is an apocalyptic number.

20311140402 is an abundant number, since it is smaller than the sum of its proper divisors (30090954510).

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

20311140402 is a wasteful number, since it uses less digits than its factorization.

20311140402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345663 (or 345660 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20311140402 its reverse (20404111302), we get a palindrome (40715251704).

The spelling of 20311140402 in words is "twenty billion, three hundred eleven million, one hundred forty thousand, four hundred two".