21073474143 has 12 divisors (see below), whose sum is σ = 30443083528. Its totient is φ = 14047311600.

The previous prime is 21073474139. The next prime is 21073474151. The reversal of 21073474143 is 34147437012.

It is not a de Polignac number, because 21073474143 - 2² = 21073474139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21073474098 and 21073474107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073474153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56833 + ... + 213018.

Almost surely, 2^21073474143 is an apocalyptic number.

21073474143 is a deficient number, since it is larger than the sum of its proper divisors (9369609385).

21073474143 is a wasteful number, since it uses less digits than its factorization.

21073474143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278534 (or 278531 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 21073474143 in words is "twenty-one billion, seventy-three million, four hundred seventy-four thousand, one hundred forty-three".