2106542154434 has 4 divisors (see below), whose sum is σ = 3159813231654. Its totient is φ = 1053271077216.

The previous prime is 2106542154331. The next prime is 2106542154449. The reversal of 2106542154434 is 4344512456012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1445532503809 + 661009650625 = 1202303^2 + 813025^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2106542154391 and 2106542154400.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526635538607 + ... + 526635538610.

Almost surely, 2^{2106542154434} is an apocalyptic number.

2106542154434 is a deficient number, since it is larger than the sum of its proper divisors (1053271077220).

2106542154434 is a wasteful number, since it uses less digits than its factorization.

2106542154434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053271077219.

The product of its (nonzero) digits is 460800, while the sum is 41.

The spelling of 2106542154434 in words is "two trillion, one hundred six billion, five hundred forty-two million, one hundred fifty-four thousand, four hundred thirty-four".