21343441992 has 32 divisors (see below), whose sum is σ = 53372791680. Its totient is φ = 7112589120.

The previous prime is 21343441991. The next prime is 21343441993. The reversal of 21343441992 is 29914434312.

It is an interprime number because it is at equal distance from previous prime (21343441991) and next prime (21343441993).

It is not an unprimeable number, because it can be changed into a prime (21343441991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24559 + ... + 208062.

It is an arithmetic number, because the mean of its divisors is an integer number (1667899740).

Almost surely, 2^21343441992 is an apocalyptic number.

It is an amenable number.

21343441992 is an abundant number, since it is smaller than the sum of its proper divisors (32029349688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21343441992 is a wasteful number, since it uses less digits than its factorization.

21343441992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236453 (or 236449 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The spelling of 21343441992 in words is "twenty-one billion, three hundred forty-three million, four hundred forty-one thousand, nine hundred ninety-two".