21496269436 has 12 divisors (see below), whose sum is σ = 37619505000. Its totient is φ = 10747839440.

The previous prime is 21496269427. The next prime is 21496269437. The reversal of 21496269436 is 63496269412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21496269437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219315 + ... + 301813.

It is an arithmetic number, because the mean of its divisors is an integer number (3134958750).

Almost surely, 2^21496269436 is an apocalyptic number.

It is an amenable number.

21496269436 is a deficient number, since it is larger than the sum of its proper divisors (16123235564).

21496269436 is a wasteful number, since it uses less digits than its factorization.

21496269436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147644 (or 147642 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 52.

The spelling of 21496269436 in words is "twenty-one billion, four hundred ninety-six million, two hundred sixty-nine thousand, four hundred thirty-six".