2123654223434 has 24 divisors (see below), whose sum is σ = 3285102951840. Its totient is φ = 1029573231840.

The previous prime is 2123654223409. The next prime is 2123654223517. The reversal of 2123654223434 is 4343224563212.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 2123654223391 and 2123654223400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1389614 + ... + 2485625.

It is an arithmetic number, because the mean of its divisors is an integer number (136879289660).

Almost surely, 2^{2123654223434} is an apocalyptic number.

2123654223434 is a deficient number, since it is larger than the sum of its proper divisors (1161448728406).

2123654223434 is a wasteful number, since it uses less digits than its factorization.

2123654223434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875486 (or 3875445 counting only the distinct ones).

The product of its digits is 829440, while the sum is 41.

Adding to 2123654223434 its reverse (4343224563212), we get a palindrome (6466878786646).

The spelling of 2123654223434 in words is "two trillion, one hundred twenty-three billion, six hundred fifty-four million, two hundred twenty-three thousand, four hundred thirty-four".