21932269646 has 32 divisors (see below), whose sum is σ = 38710913472. Its totient is φ = 9123690240.

The previous prime is 21932269633. The next prime is 21932269649. The reversal of 21932269646 is 64696223912.

It is a junction number, because it is equal to n+sod(n) for n = 21932269594 and 21932269603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21932269649) 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, 16100 + ... + 210056.

It is an arithmetic number, because the mean of its divisors is an integer number (1209716046).

Almost surely, 2^21932269646 is an apocalyptic number.

21932269646 is a deficient number, since it is larger than the sum of its proper divisors (16778643826).

21932269646 is a wasteful number, since it uses less digits than its factorization.

21932269646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194204.

The product of its digits is 1679616, while the sum is 50.

The spelling of 21932269646 in words is "twenty-one billion, nine hundred thirty-two million, two hundred sixty-nine thousand, six hundred forty-six".