20010123434 has 48 divisors (see below), whose sum is σ = 35358771240. Its totient is φ = 8467401600.

The previous prime is 20010123409. The next prime is 20010123473. The reversal of 20010123434 is 43432101002.

It can be written as a sum of positive squares in 4 ways, for example, as 18687710209 + 1322413225 = 136703^2 + 36365^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3847724 + ... + 3852920.

Almost surely, 2^20010123434 is an apocalyptic number.

20010123434 is a deficient number, since it is larger than the sum of its proper divisors (15348647806).

20010123434 is a wasteful number, since it uses less digits than its factorization.

20010123434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5703 (or 5696 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20010123434 its reverse (43432101002), we get a palindrome (63442224436).

The spelling of 20010123434 in words is "twenty billion, ten million, one hundred twenty-three thousand, four hundred thirty-four".