20402130042 has 64 divisors (see below), whose sum is σ = 54542054400. Its totient is φ = 5522379120.

The previous prime is 20402130041. The next prime is 20402130053. The reversal of 20402130042 is 24003120402.

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

It is a junction number, because it is equal to n+sod(n) for n = 20402129997 and 20402130024.

It is not an unprimeable number, because it can be changed into a prime (20402130041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1413184 + ... + 1427547.

It is an arithmetic number, because the mean of its divisors is an integer number (852219600).

Almost surely, 2^20402130042 is an apocalyptic number.

20402130042 is an abundant number, since it is smaller than the sum of its proper divisors (34139924358).

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

20402130042 is a wasteful number, since it uses less digits than its factorization.

20402130042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840768 (or 2840762 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20402130042 its reverse (24003120402), we get a palindrome (44405250444).

The spelling of 20402130042 in words is "twenty billion, four hundred two million, one hundred thirty thousand, forty-two".