21238463673 has 12 divisors (see below), whose sum is σ = 35060321088. Its totient is φ = 12136264920.

The previous prime is 21238463671. The next prime is 21238463737. The reversal of 21238463673 is 37636483212.

21238463673 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 8 + 4 + 636 + 7 + 3 = 666.

It is not a de Polignac number, because 21238463673 - 2¹ = 21238463671 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21238463671) 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, 168559173 + ... + 168559298.

It is an arithmetic number, because the mean of its divisors is an integer number (2921693424).

Almost surely, 2^21238463673 is an apocalyptic number.

It is an amenable number.

21238463673 is a deficient number, since it is larger than the sum of its proper divisors (13821857415).

21238463673 is a wasteful number, since it uses less digits than its factorization.

21238463673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337118484 (or 337118481 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The spelling of 21238463673 in words is "twenty-one billion, two hundred thirty-eight million, four hundred sixty-three thousand, six hundred seventy-three".