21341883964 has 6 divisors (see below), whose sum is σ = 37348296944. Its totient is φ = 10670941980.

The previous prime is 21341883949. The next prime is 21341883967. The reversal of 21341883964 is 46938814312.

It is a happy number.

It is a super-2 number, since 2×21341883964² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341883967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2667735492 + ... + 2667735499.

Almost surely, 2^21341883964 is an apocalyptic number.

It is an amenable number.

21341883964 is a deficient number, since it is larger than the sum of its proper divisors (16006412980).

21341883964 is a wasteful number, since it uses less digits than its factorization.

21341883964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5335470995 (or 5335470993 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

The spelling of 21341883964 in words is "twenty-one billion, three hundred forty-one million, eight hundred eighty-three thousand, nine hundred sixty-four".