21743401512 has 48 divisors (see below), whose sum is σ = 63233364960. Its totient is φ = 6212400096.

The previous prime is 21743401501. The next prime is 21743401513. The reversal of 21743401512 is 21510434712.

It is a super-2 number, since 2×21743401512² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21743401512.

It is not an unprimeable number, because it can be changed into a prime (21743401513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9243468 + ... + 9245819.

It is an arithmetic number, because the mean of its divisors is an integer number (1317361770).

Almost surely, 2^21743401512 is an apocalyptic number.

It is an amenable number.

21743401512 is an abundant number, since it is smaller than the sum of its proper divisors (41489963448).

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

21743401512 is a wasteful number, since it uses less digits than its factorization.

21743401512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18489310 (or 18489299 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 21743401512 in words is "twenty-one billion, seven hundred forty-three million, four hundred one thousand, five hundred twelve".