21500141343026 has 4 divisors (see below), whose sum is σ = 32250212014542. Its totient is φ = 10750070671512.

The previous prime is 21500141342963. The next prime is 21500141343059. The reversal of 21500141343026 is 62034314100512.

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., 18415899390625 + 3084241952401 = 4291375^2 + 1756201^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21500141342983 and 21500141343001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5375035335755 + ... + 5375035335758.

Almost surely, 2^{21500141343026} is an apocalyptic number.

21500141343026 is a deficient number, since it is larger than the sum of its proper divisors (10750070671516).

21500141343026 is a wasteful number, since it uses less digits than its factorization.

21500141343026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10750070671515.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 21500141343026 its reverse (62034314100512), we get a palindrome (83534455443538).

The spelling of 21500141343026 in words is "twenty-one trillion, five hundred billion, one hundred forty-one million, three hundred forty-three thousand, twenty-six".