21343401744 has 40 divisors (see below), whose sum is σ = 63013853760. Its totient is φ = 6098114688.

The previous prime is 21343401721. The next prime is 21343401763. The reversal of 21343401744 is 44710434312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31760679 + ... + 31761350.

It is an arithmetic number, because the mean of its divisors is an integer number (1575346344).

Almost surely, 2^21343401744 is an apocalyptic number.

21343401744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21343401744 is an abundant number, since it is smaller than the sum of its proper divisors (41670452016).

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

21343401744 is a wasteful number, since it uses less digits than its factorization.

21343401744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63522047 (or 63522041 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The spelling of 21343401744 in words is "twenty-one billion, three hundred forty-three million, four hundred one thousand, seven hundred forty-four".