21150023046434 has 4 divisors (see below), whose sum is σ = 31725034569654. Its totient is φ = 10575011523216.

The previous prime is 21150023046409. The next prime is 21150023046469. The reversal of 21150023046434 is 43464032005112.

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., 19209838707409 + 1940184339025 = 4382903^2 + 1392905^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21150023046394 and 21150023046403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5287505761607 + ... + 5287505761610.

Almost surely, 2^{21150023046434} is an apocalyptic number.

21150023046434 is a deficient number, since it is larger than the sum of its proper divisors (10575011523220).

21150023046434 is a wasteful number, since it uses less digits than its factorization.

21150023046434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10575011523219.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 21150023046434 in words is "twenty-one trillion, one hundred fifty billion, twenty-three million, forty-six thousand, four hundred thirty-four".