21244750345 has 32 divisors (see below), whose sum is σ = 33028289280. Its totient is φ = 12739472640.

The previous prime is 21244750343. The next prime is 21244750367. The reversal of 21244750345 is 54305744212.

It is not a de Polignac number, because 21244750345 - 2¹ = 21244750343 is a prime.

It is a super-3 number, since 3×21244750345³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21244750343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1220086 + ... + 1237375.

It is an arithmetic number, because the mean of its divisors is an integer number (1032134040).

Almost surely, 2^21244750345 is an apocalyptic number.

It is an amenable number.

21244750345 is a deficient number, since it is larger than the sum of its proper divisors (11783538935).

21244750345 is a wasteful number, since it uses less digits than its factorization.

21244750345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457505.

The product of its (nonzero) digits is 134400, while the sum is 37.

The spelling of 21244750345 in words is "twenty-one billion, two hundred forty-four million, seven hundred fifty thousand, three hundred forty-five".