21283892474 has 32 divisors (see below), whose sum is σ = 34594756560. Its totient is φ = 9762619392.

The previous prime is 21283892459. The next prime is 21283892477. The reversal of 21283892474 is 47429838212.

It can be written as a sum of positive squares in 8 ways, for example, as 7522960225 + 13760932249 = 86735^2 + 117307^2 .

It is not an unprimeable number, because it can be changed into a prime (21283892477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3492422 + ... + 3498510.

Almost surely, 2^21283892474 is an apocalyptic number.

21283892474 is a deficient number, since it is larger than the sum of its proper divisors (13310864086).

21283892474 is a wasteful number, since it uses less digits than its factorization.

21283892474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6914.

The product of its digits is 1548288, while the sum is 50.

The spelling of 21283892474 in words is "twenty-one billion, two hundred eighty-three million, eight hundred ninety-two thousand, four hundred seventy-four".