20423202102 has 12 divisors (see below), whose sum is σ = 44250271260. Its totient is φ = 6807734028.

The previous prime is 20423202091. The next prime is 20423202103. The reversal of 20423202102 is 20120232402.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1134622339 = 20423202102 / (2 + 0 + 4 + 2 + 3 + 2 + 0 + 2 + 1 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423202103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 567311152 + ... + 567311187.

It is an arithmetic number, because the mean of its divisors is an integer number (3687522605).

Almost surely, 2^20423202102 is an apocalyptic number.

20423202102 is an abundant number, since it is smaller than the sum of its proper divisors (23827069158).

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

20423202102 is a wasteful number, since it uses less digits than its factorization.

20423202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134622347 (or 1134622344 counting only the distinct ones).

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

Adding to 20423202102 its reverse (20120232402), we get a palindrome (40543434504).

The spelling of 20423202102 in words is "twenty billion, four hundred twenty-three million, two hundred two thousand, one hundred two".