21446474044 has 6 divisors (see below), whose sum is σ = 37531329584. Its totient is φ = 10723237020.

The previous prime is 21446474041. The next prime is 21446474047. The reversal of 21446474044 is 44047464412.

It is an interprime number because it is at equal distance from previous prime (21446474041) and next prime (21446474047).

It is a junction number, because it is equal to n+sod(n) for n = 21446473988 and 21446474006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446474041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680809252 + ... + 2680809259.

Almost surely, 2^21446474044 is an apocalyptic number.

It is an amenable number.

21446474044 is a deficient number, since it is larger than the sum of its proper divisors (16084855540).

21446474044 is a wasteful number, since it uses less digits than its factorization.

21446474044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361618515 (or 5361618513 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 40.

The spelling of 21446474044 in words is "twenty-one billion, four hundred forty-six million, four hundred seventy-four thousand, forty-four".