20402130023 has 16 divisors (see below), whose sum is σ = 23512928640. Its totient is φ = 17507728800.

The previous prime is 20402130019. The next prime is 20402130041. The reversal of 20402130023 is 32003120402.

It is a cyclic number.

It is not a de Polignac number, because 20402130023 - 2² = 20402130019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20402129983 and 20402130010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402130053) 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, 118313 + ... + 234098.

It is an arithmetic number, because the mean of its divisors is an integer number (1469558040).

Almost surely, 2^20402130023 is an apocalyptic number.

20402130023 is a deficient number, since it is larger than the sum of its proper divisors (3110798617).

20402130023 is a wasteful number, since it uses less digits than its factorization.

20402130023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352718.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20402130023 its reverse (32003120402), we get a palindrome (52405250425).

The spelling of 20402130023 in words is "twenty billion, four hundred two million, one hundred thirty thousand, twenty-three".