20102105430 has 96 divisors (see below), whose sum is σ = 60370865568. Its totient is φ = 4586572800.

The previous prime is 20102105407. The next prime is 20102105459. The reversal of 20102105430 is 3450120102.

20102105430 is a `hidden beast` number, since 20 + 1 + 0 + 210 + 5 + 430 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 580381 + ... + 614040.

It is an arithmetic number, because the mean of its divisors is an integer number (628863183).

Almost surely, 2^20102105430 is an apocalyptic number.

20102105430 is an abundant number, since it is smaller than the sum of its proper divisors (40268760138).

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

20102105430 is a wasteful number, since it uses less digits than its factorization.

20102105430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194462 (or 1194459 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 20102105430 its reverse (3450120102), we get a palindrome (23552225532).

The spelling of 20102105430 in words is "twenty billion, one hundred two million, one hundred five thousand, four hundred thirty".