21432746247346 has 16 divisors (see below), whose sum is σ = 36806197222080. Its totient is φ = 9169376049360.

The previous prime is 21432746247331. The next prime is 21432746247413. The reversal of 21432746247346 is 64374264723412.

It is a super-2 number, since 2×21432746247346² (a number of 27 digits) contains 22 as substring.

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, 1340544061 + ... + 1340560048.

It is an arithmetic number, because the mean of its divisors is an integer number (2300387326380).

Almost surely, 2^{21432746247346} is an apocalyptic number.

21432746247346 is a deficient number, since it is larger than the sum of its proper divisors (15373450974734).

21432746247346 is a wasteful number, since it uses less digits than its factorization.

21432746247346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681104689.

The product of its digits is 32514048, while the sum is 55.

The spelling of 21432746247346 in words is "twenty-one trillion, four hundred thirty-two billion, seven hundred forty-six million, two hundred forty-seven thousand, three hundred forty-six".